_Abstract_: In this paper, I will examine the Goldstein-Cassirer approach to neuropathology to determine its current potential for yielding valuable insights. To this end, I will reconstruct the philosophical and theoretical underpinnings of such a standpoint in the first four sections. What will emerge is that it entails a definition of pathology as the loss of balance in the adaption of human beings to the environment, leading to a lack of proclivity to categorical behaviour and symbolic performances. Furthermore, we will (...) see that there are behavioural alterations which are not related to the locus of lesions. In the fifth section, I will compare and contrast the holistic stances with current research in neuropsychology. The sixth section is dedicated to conclusive remarks. _Keywords_: Psychopathology; Neuropathology; Ernst Cassirer; Kurt Goldstein; Holism _ La mente ordinatrice. La concezione di Goldstein e Cassirer della neuropatologia e la sua rilevanza oggi _ _Riassunto_: In questo articolo intendo analizzare l’approccio Goldstein-Cassirer alla neuropatologia per comprendere se esso può rivelarsi ancora utile alla luce delle ricerche attuali. A tal fine, ne ricostruirò le basi filosofiche e teoriche nei primi tre paragrafi. Scopriremo che esso implica una definizione di patologia come perdita di equilibrio nell’adattamento degli esseri umani all’ambiente, a seguito della quale viene a mancare la naturale tendenza verso il “comportamento categoriale” e le prestazioni simboliche. Vedremo, inoltre, che vi sono alterazioni del comportamento non collegabili al sito delle lesioni. Nel quinto paragrafo, metterò a confronto le istanze olistiche con le ricerche contemporanee nel campo della neuropsicologia. Il sesto paragrafo contiene le considerazioni conclusive. _Parole chiave_: Psicopatologia; Neuropatologia; Ernst Cassirer; Kurt Goldstein; Olismo. (shrink)

This information-packed volume, without doubt a landmark event in the developing neuroscientific study of consciousness, deserves the attention of anyone interested in this subject. It is a sequel and companion to an earlier collection, The Boundaries of Consciousness: Neurobiology and Neuropathology, also edited by Steven Laureys (2005), which contains the proceedings of a 2004 conference sponsored by the Association for the Scientific Study of Consciousness (ASSC). Published initially as a special issue of Progress in Brain Research (volume 150), Boundaries has (...) been reissued in paperback and appears on the ASSC website as one of its official titles. Both volumes include many prominent figures in contemporary neuroscience, and the two volumes together constitute about as clear, comprehensive, and authoritative a picture as one can find anywhere of the current state of mainstream neuroscientific thinking about consciousness and the brain. Like classical physics of the late 19th century, it is a picture of great power and beauty; nevertheless, just as discordant phenomena such as black-body radiation and the photoelectric effect presaged the rise of quantum mechanics, this book, precisely because of its clarity, reveals signs of trouble ahead. (shrink)

Consciousness is one of the most significant scientific problems today. Renewed interest in the nature of consciousness - a phenomenon long considered not to be scientifically explorable, as well as increasingly widespread availability of multimodal functional brain imaging techniques (EEG, ERP, MEG, fMRI and PET), now offer the possibility of detailed, integrated exploration of the neural, behavioral, and computational correlates of consciousness. The present volume aims to confront the latest theoretical insights in the scientific study of human consciousness with the (...) most recent behavioral, neuroimaging, electrophysiological, pharmacological and neuropathological data on brain function in altered states of consciousness such as: brain death, coma, vegetative state, minimally conscious state, locked-in syndrome, dementia, epilepsy, schizophrenia, hysteria, general anesthesia, sleep, hypnosis, and hallucinations. The interest of this is threefold. First, patients with altered states of consciousness continue to represent a major clinical problem in terms of clinical assessment of consciousness and daily management. Second, the exploration of brain function in altered states of consciousness represents a unique lesional approach to the scientific study of consciousness and adds to the worldwide effort to identify the "neural correlate of consciousness". Third, new scientific insights in this field have major ethical and social implications regarding our care for these patients. (shrink)

I develop an interpretation of Maurice Merleau-Ponty's concept of motor intentionality, one that emerges out of a reading of his presentation of a now classic case study in neuropathology—patient Johann Schneider—in Phenomenology of Perception. I begin with Merleau-Ponty's prescriptions for how we should use the pathological as a guide to the normal, a method I call triangulation. I then turn to his presentation of Schneider's unusual case. I argue that we should treat all of Schneider's behaviors as pathological, not only (...) his abstract movements, as is commonly acknowledged in the secondary literature, but also crucially his concrete movements. Using these facts of Schneider's illness, I reconstruct a ‘fundamental function’ of consciousness, as Merleau-Ponty called it, in which there are two kinds of bodily agency: the power of the body to be solicited by a situation and the power of the body to project a situation. I propose that these powers became dissociated in Schneider's case, as evidenced by his abstract and concrete movements, while in the normal case, these powers comprise a dynamic unity, enacted as motor intentionality. I also discuss how my interpretation complements Merleau-Ponty's assertion that motor intentions exist between mind and matter. (shrink)

During the Third Reich, state‐sponsored violence was linked to scientific research on many levels. Prisoners were used as involuntary subjects for medical experiments, and body parts from victims were used in anatomy and neuropathology on a massive scale. In many cases, such specimens remained in scientific collections and were used until long after the war. International bioethics, for a long time, had little to say on the issue. Since the late 1980s, with a renewed interest in the Holocaust and other (...) Nazi crimes, a consensus has increasingly taken hold that research on human tissues and body parts from the Nazi era is inadmissible, and that such specimens should be removed from scientific collections and buried. The question of what to do with scientific data obtained from these sources has not received adequate attention, however, and remains unsolved. This paper traces the history of debates about the ethical implications of using human tissue or body parts from the Nazi period for scientific purposes, primarily in the fields of anatomy and neuropathology. It also examines how this issue, from after the war until today, influenced the establishment of legal and bioethical norms on the use of human remains from morally tainted sources, with a particular emphasis on Germany and Austria. It is argued that the use of such specimens and of data derived from them is unethical not only because of potential harms to posthumous rights of the victims, but also because such use constitutes a moral harm to society at large. (shrink)

This collection opens a dialogue between process philosophy and contemporary consciousness studies. Approaching consciousness from diverse disciplinary perspectives—philosophy, psychology, neuroscience, neuropathology, psychotherapy, biology, animal ethology, and physics—the contributors offer empirical and philosophical support for a model of consciousness inspired by the process philosophy of Alfred North Whitehead (1861–1947). Whitehead’s model is developed in ways he could not have anticipated to show how it can advance current debates beyond well-known sticking points. This has trenchant consequences for epistemology and suggests fresh and (...) promising new perspectives on such topics as the mind-body problem, the neurobiology of consciousness, animal consciousness, the evolution of consciousness, panpsychism, the unity of consciousness, epiphenomenalism, free will, and causation. Contents: Introduction, Michel Weber & Anderson Weekes I. Setting the Stage 1. Process Thought as a Heuristic for Investigating Consciousness, Michel Weber & Anderson Weekes 2. Whitehead as a Neglected Figure of 20th Century Philosophy, Michel Weber & Anderson Weekes 3. Consciousness as a Topic of Investigation in Western Thought, Anderson Weekes 4. Whitehead’s Unique Approach to the Topic of Consciousness, Anderson Weekes II. Psychology and Philosophy of Mind 5. Consciousness as a Subjective Form, David Ray Griffin 6. The Interpretation and Integration of the Literature on Consciousness from a Process Perspective, Michael W. Katzko 7. Windows on Nonhuman Minds, Donald R. Griffin III. From Metaphysics to (Neuro)Science and Back Again 8. Panexperientialism, Quantum Theory, and Neuroplasticity, George W. Shields 9. The Evolution of Consciousness, Max Velmans 10. The Carrier Theory Of Causation, Gregg H. Rosenberg IV. Clinical Applications: Consciousness as Process 11. The Microgenetic Revolution in Contemporary Neuropsychology and Neurolinguistics, Maria Pachalska and Bruce Duncan MacQueen 12. From Coma to Consciousness, Avraham Schweiger, Michael Frost, Ofer Keren 13. Consciousness and Rationality from a Process Perspective, Michel Weber V. History (and Future?) of Philosophy 14. Consciousness, Memory, and Recollection according to Whitehead, Xavier Verley 15. Consciousness and Causation in Light of Whitehead’s Phenomenology of Becoming, Anderson Weekes. (shrink)

Is there a theory that explains the essence of consciousness? Or is consciousness itself just an illusion? The "last great mystery of science," consciousness was excluded from serious research for most of the last century but is now a rapidly expanding area of study for students of psychology, philosophy, and neuroscience. Recently the topic has also captured growing popular interest. This groundbreaking book is the first volume to bring together all the major theories of consciousness studies--from those rooted in traditional (...) Western philosophy to those coming out of neuroscience, quantum theory, and Eastern philosophy. Broadly interdisciplinary, Consciousness: An Introduction is divided into nine sections that examine such topics as how subjective experiences arise from objective brain processes, the basic neuroscience and neuropathology of consciousness, altered states of consciousness, mystical experiences and dreams, and the effects of drugs and meditation. It also discusses the nature of self, the possibility of artificial consciousness in robots, and the question of whether or not animals are conscious. Enhanced by numerous illustrations and profiles of important researchers, the book also includes self-assessment questions, further reading suggestions, and practical exercises that help bring the subject to life. (shrink)

In this article, I review textual evidence demonstrating that James and Dewey incorporated Kant’s ideas, even while criticizing him. I specifically argue that the pragmatic evolution of the Kantian a priori carried out by James and Dewey is a transition from the mental to the bodily. I further argue that the parallels between pragmatists and Kant, along with the transition from the mental to bodily, relate to scientific contexts in which all developed their outlooks. Though historically grounded, my ultimate goal (...) is to show that pragmatism and by extension Kantianism mesh with and indeed contribute to cutting edge ideas in fields ranging from neuropathology to robotics and AI to cognitive science, whether in the form of Gibsonian theory or enactivism. (shrink)

Pathological gambling (PG) is a kind of ‘ideal puzzle’ for the economic model of the consumer. The pathological gambler takes pains to engage in activity that transparently has negative expected returns if utility varies positively with money. She also, typically, spends further resources on commitment devices designed to interfere with her gambling. These properties together describe an agent that is a kind of perfect foil for the rationally maximizing consumer. Recently, aspects of the neuropathology underlying the strange economic agency of (...) the pathological gambler are becoming understood. Thus PG is an ideal test bed phenomenon for working out relationships between economic modeling based on constrained optimization of utility and the new neuroscience of behavior. (shrink)

[In French] This paper outlines Merleau-Ponty’s interpretation of higher-order cognition as a fundamentally embodied process that is enacted by motor subject situated in natural and cultural environment. More specifically, I exemplify Merleau-Ponty’s interdisciplinary approach to cognition on his interpretations of motor intentionality, operative speech, and mathematical reasoning, which are based on neuropathology, linguistics, and gestalt psychology, respectively. In this analysis, I aim to show that the body is involved in cognition as an operator of the phenomenal structuration of the environment (...) even at the level of linguistic, rational, and abstract experience. (shrink)

The neuropathologies of the self are disorders of the self and identity that occur in association with neuropathology and include perturbations of the bodily, relational, and narrative self. Right, especially medial-frontal and orbitofrontal lesions, are associated with these conditions. The ego disequilibrium theory proposes this brain pathology causes a disturbance of ego boundaries and functions and the emergence of developmentally immature styles of thought, ego functioning, and psychological defenses including denial, projection, splitting, and fantasy that the NPS patient has in (...) common with the child. I hypothesize that during brain development between approximately ages 3 and 7 immature defensive functions and fantasies tend to be replaced by mature defenses and the inhibition of fantasy a process that depends upon maturational processes within the right hemisphere. I propose a four-tiered model of the NPS that emphasizes a multifactorial approach and includes both negative and positive, bottom up and top down, and neuropsychological and psychological factors. (shrink)

Progressive supranuclear palsy is a movement disorder with prominent tau neuropathology. Brain diseases with abnormal tau deposits are called tauopathies, the most common of which is Alzheimer's disease. Environmental causes of tauopathies include repetitive head trauma associated with some sports. To identify common genetic variation contributing to risk for tauopathies, we carried out a genome-wide association study of 1,114 individuals with PSP and 3,247 controls followed by a second stage in which we genotyped 1,051 cases and 3,560 controls for the (...) stage 1 SNPs that yielded P ≤ 10-3. We found significant previously unidentified signals associated with PSP risk at STX6, EIF2AK3 and MOBP. We confirmed two independent variants in MAPT affecting risk for PSP, one of which influences MAPT brain expression. The genes implicated encode proteins for vesicle-membrane fusion at the Golgi-endosomal interface, for the endoplasmic reticulum unfolded protein response and for a myelin structural component. © 2011 Nature America, Inc. All rights reserved. (shrink)

Within the still-dominant medical discourse on dementia, disorders of language feature prominently among diagnostic criteria. In this view, changes in ability to produce or understand coherent speech are considered to be an inevitable result of neuropathology. Alternative psychosocial accounts of communicative challenges in dementia exists, but to date, little emphasis has been placed on people with dementia as social actors who create meaning and context from their social interactions. In this article we draw on Bakhtin’s concepts of the carnivalesque, heteroglossia, (...) polyphony and dialogism to analyse a series of interactions involving people with dementia in day and residential care environments. We argue that many of the communicative challenges faced by people with dementia arise from the social environments in which they find themselves, and that the utterances of people with dementia in the face of these social challenges show many of the hallmarks of cultural resistance identified by Bakhtin. (shrink)

McGovern, Kevin This article reviews three statements from the National Health and Medical Research Council on post-coma unresponsiveness (PCU). One of the functions of the NHMRC is to propose standards and guidelines for health care in Australia. The paper explores the causes and neuropathology of PCU, imaging and other tests and prognosis from unresponsiveness.

The scientific study of consciousness in the late 19th century, which took place in Western countries across disciplines such as neurology, physiology, neuropathology, psychology, psychiatry and philosophy, appears to have striking parallels to current crossdisciplinary developments in the neurosciences. The 19th century period, however, has received little scholarly attention from historians of medicine, psychology, or science. Historians of depth psychology have investigated the area as part of the history of psychiatry, but cleaved most closely to the versions presented by early (...) psychoanalysts- turned-historians, who have consistently portrayed Freud as the only legitimate history of the period, thus marking the territory of the late 19th century as inherently Freudo-centric. More recently a new line of historiography emanating from the work of the late Henri Ellenberger has launched a post-Freudian perspective in which the classical depth psychologies of Freud, Jung, and Adler may now be understood in a wider and deeper historical context defined by the development of a so-called French, Swiss, English, and American psychotherapeutic axis between 1881 and 1918, before the advent of psychoanalysis. Chief among the prime movers of this axis was Frederic William Henry Myers, graduate of Cambridge University, and co-founder of the Society for Psychical Research in England in 1882. Myers' grasp of the literature of the day regarding the scientific study of consciousness was both profound, and highly influential, particularly on such figures as William James. Since the period itself has yet to be fully reconstructed, the identity of Myers and his contribution to the scientific study of consciousness remain obscure, but are also receiving new attention in the area of modern consciousness studies. (shrink)

In recent years, neuroscience has begun to transform itself into a “big data” enterprise with the importation of computational and statistical techniques from machine learning and informatics. In addition to their translational applications such as brain-computer interfaces and early diagnosis of neuropathology, these tools promise to advance new solutions to longstanding theoretical quandaries. Here I critically assess whether these promises will pay off, focusing on the application of multivariate pattern analysis (MVPA) to the problem of reverse inference. I argue that (...) MVPA does not inherently provide a new answer to classical worries about reverse inference, and that the method faces pervasive interpretive problems of its own. Further, the epistemic setting of MVPA and other decoding methods contributes to a potentially worrisome shift towards prediction and away from explanation in fundamental neuroscience. (shrink)

This dissertation is a contribution to the contemporary field of phenomenological psychopathology, or the phenomenological study of psychiatric disorders. The work proceeds with two major aims. The first is to show how a phenomenological approach can clarify and illuminate the nature of psychopathology—specifically those conditions typically labeled as major depressive disorder and bipolar disorder. The second is to show how engaging with psychopathological conditions can challenge and undermine many phenomenological presuppositions, especially phenomenology’s status as a transcendental philosophy and its corresponding (...) anti-naturalistic outlook. In the opening chapter, I articulate the three layers of the subject matter of phenomenological research—what I refer to as “existentials,” “modes,” and “prejudices.” As I argue, while each layer contributes to what we might call the “structure” of human existence, they do not do so in the same way, or to the same degree. Because phenomenological psychopathology—and applied phenomenology in general—aims to characterize how the structure of human existence can change and alter, it is paramount that these layers be adequately delineated and defined before investigating these changes. In chapters two through five, I conduct hermeneutic and phenomenological investigations of psychopathological phenomena typically labeled as major depressive disorder or bipolar disorder. These investigations address the affective aspects of depression and mania, and the embodied aspects of depression. In addition to clearly articulating the nature of these phenomena, I show how certain psychopathological conditions involve changes in the deepest or most fundamental layer of human existence—what I refer to as existentials. As I argue, many of the classical phenomenologists (including Husserl and Heidegger) believed that these structural features were necessary, unchanging, and universal. However, this presupposition is challenged through the examination of psychopathological and neuropathological conditions, undermining the status of phenomenology as a transcendental philosophy. While this challenge to classical phenomenology is only sketched in the early chapters, in chapters six and seven I develop it in more detail in order to achieve two distinct ends. In chapter six I argue that psychopathology and neuropathology not only challenge phenomenology’s status as a transcendental philosophy, but also supply a key to developing a phenomenological naturalism (which I contrast with a naturalized phenomenology). Phenomenological naturalism, as I articulate it, is a position in which phenomenology is not subsumed by the metaphysical and methodological framework of the natural sciences, but nonetheless maintains the capacity to investigate how the natural world stands independent of human subjectivity (and how events in the natural world can bring about changes in the most fundamental structures of human existence). In the seventh chapter I argue that a phenomenology in which existentials are contingent and variable rather than necessary and unchanging allows phenomenologists to contribute to new dimensional approaches to psychiatric classification. Rather than begin from distinct categories of disorder, these approaches begin from distinct core features of human existence. These features, referred to as either dimensions or constructs, can vary in degree and are studied in both normal and pathological forms. (shrink)

In dementia research evidence is mounting that therapeutic strategies that target moderate and even mild Alzheimer's disease may be missing the ‘therapeutic window’. Given that the neuropathology that leads to Alzheimer's disease probably begins somewhere between 10 and 15 years before symptoms manifest, many believe that the optimal therapeutic strategy would target persons in the earliest phases of disease development or even earlier. This would include, for example, persons with prodromal Alzheimer's and even persons who are deemed at risk. Given (...) the nature of research involving the central nervous system, it is conceivable that some therapeutic investigations may involve an increase over minimal risk. This paper examines how, in dementia research, at-risk persons, although healthy, bring multiple and intersecting vulnerabilities to the prospect of research participation even though they are clinically healthy. Current guidelines for research ethics may not provide adequately for the nuances of ‘healthy individuals’ and their possible vulnerabilities. In the context of neurodegenerative disease, the fact of being ‘at risk’ alters the vulnerability profile in significant ways. While healthy persons who are at risk of developing dementia may not appear to warrant placement in the research category of vulnerable participants (alongside prisoners, pregnant women and children) careful regard for the vulnerabilities that arise as a result of the intersecting circumstances of being healthy and at risk of an incurable disease are worthy of increased attention and consideration, particularly as the research effort for the increasingly prevalent disease of Alzheimer's moves forward. (shrink)

After the unexpected death of Professor Józef Kałuża at the age of 74 on the 26th of July 2003, not only Polish neuropathology but also Polish philosophy of medical investigations lost one of its most renowned minds. Beginning in 1949, Professor Kałuża studied medical sciences for five years at the Medical Faculty of the Jagiellonian University in Cracow. He did his Ph.D. thesis in neuropathology in the Department of Neuropathology of the Polish Academy of Science. In 1962 he received a (...) Rockefeller Foundation scholarship and spent one year at the National Institutes of Health. In 1981 Professor Kaluza was promoted to a tenured professorship in neuropathology. He is the author of more than 110 articles published in medical periodicals and coauthor of many chapters in medical handbooks. (shrink)

After the unexpected death of Professor Józef Kałuża at the age of 74 on the 26th of July 2003, not only Polish neuropathology but also Polish philosophy of medical investigations lost one of its most renowned minds. Beginning in 1949, Professor Kałuża studied medical sciences for five years at the Medical Faculty of the Jagiellonian University in Cracow. He did his Ph.D. thesis in neuropathology in the Department of Neuropathology of the Polish Academy of Science. In 1962 he received a (...) Rockefeller Foundation scholarship and spent one year at the National Institutes of Health. In 1981 Professor Kaluza was promoted to a tenured professorship in neuropathology. He is the author of more than 110 articles published in medical periodicals and coauthor of many chapters in medical handbooks. (shrink)

Migraine is a chronic and idiopathic disorder leading to cognitive and affective problems. However, the neural basis of migraine without aura is still unclear. In this study, dynamic amplitude of low-frequency fluctuations analyses were performed in 21 patients with migraine without aura and 21 gender- and age-matched healthy controls to identify the voxel-level abnormal functional dynamics. Significantly decreased dALFF in the bilateral anterior insula, bilateral lateral orbitofrontal cortex, bilateral medial prefrontal cortex, bilateral anterior cingulate cortex, and left middle frontal cortex (...) were found in patients with migraine without aura. The dALFF values in the anterior cingulate cortex were negatively correlated with pain intensity, i.e., visual analog scale. Finally, support vector machine was used to classify patients with migraine without aura from healthy controls and achieved an accuracy of 83.33%, sensitivity of 90.48%, and specificity of 76.19%. Our findings provide the evidence that migraine influences the brain functional activity dynamics and reveal the neural basis for migraine, which could facilitate understanding the neuropathology of migraine and future treatment. (shrink)

Sigmund Freud was an Austrian neurologist and the founder of psychoanalysis, a clinical method for treating psychopathology through dialogue between a patient and a psychoanalyst. Freud was born to Galician Jewish parents in the Moravian town of Freiberg, in the Austro-Hungarian Empire. He qualified as a doctor of medicine in 1881 at the University of Vienna. Upon completing his habilitation in 1885, he was appointed a docent in neuropathology and became an affiliated professor in 1902. Freud lived and worked in (...) Vienna, having set up his clinical practice there in 1886. In 1938 Freud left Austria to escape the Nazis. He died in exile in the United Kingdom in 1939. (shrink)

The use of human tissue raises ethical issues of great concern to health care professionals, biomedical researchers, ethics committees, tissue banks and policy makers because of the heightened importance given to informed consent and patient autonomy. The debate has been intensified by high profile scandals such as the “baby hearts” debacle and revelations about the retention of human brains in neuropathology laboratories worldwide. Respect for patient’s rights seems, however, to impede research and development of clinical knowledge in contemporary health care. (...) The Common clinical endeavour argument and a Presumption for beneficial use argument suggest that the use of tissues for research and teaching in contemporary health care can respect patients and their values in multicultural communities where there are provisions for oversight and for opting not to contribute, both of which should respect the diverse views of different ethnic or cultural groups. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Wilhelm Griesinger: Psychiatry between Philosophy and PraxisKatherine Arens (bio)AbstractThis essay discusses Wilhelm Griesinger’s seminal work on mental illness, Mental Pathology and Therapeutics (1867, trans. 1882), in the context of transcendental idealism, as an outgrowth of the work of Kant, Herbart, and Hegel. Griesinger drew on an adaptation of Hegel’s dialectical model of history and science to offer both a new way to interpret mental illness as a product of (...) an individual’s long-term interactions with both nature and culture and a new norm for therapeutic practice based on the patient’s role in his community and history.Mental Pathology and Therapeutics rests on Griesinger’s adaptation of the Hegelian dialectic to the context of pragmatic science, first by adopting its model of the mind, then by describing the etiology of mental disease and a taxonomy of its forms. Griesinger’s work thus stands in a largely unacknowledged tradition alive as late as Sigmund Freud and Jacques Lacan.KeywordsGriesinger, history of psychiatry/psychology, idealism, Hegel, dialecticIn the nineteenth century, Wilhelm Griesinger (1817–68) emerged as a leader in a range of fields: modern-day psychiatric clinical practice, neuropathology, and diagnostics of mental diseases. 1 Griesinger was a theoretician, a clinician, a textbook author, and the founding editor of major professional organs in his field during the political and social ferment in the German-speaking world that allowed new, more socially responsible institutional practices to be considered by intellectual communities. As a consequence of 1849 German civil reforms, theory and practice became mutually enlightening, actually allowing Griesinger to implement his theories into concrete institutional reforms in the German mental health system.Wilhelm Griesinger’s education and career were in many ways typical for his generation. He enrolled at the University of Tübingen in 1834 as a medical student; there, he became politically active (as a member of a forbidden fraternity), and, like many of his contemporaries, became familiar with Hegelian philosophy. After holding several private positions, he was appointed an associate professor (ausserordentlicher Professor) for pathology, “materia medica” and history of medicine at Tübingen in 1847. In 1848, he was called to Kiel; in 1850, to Egypt. Tübingen reappointed him as a full professor for clinical medicine and head of the university clinic in 1854. By 1860, he had moved to Zurich in a professorship for the medical clinic, where, starting in 1863, he was a key person in the planning of a new clinic for mental diseases—the Burghölzli, where Jung later worked. By 1865, he went to Berlin, as director of the Charité (mental institution), among other positions, and he wrote extensively about reform in asylum practice until his premature death in 1868.To a degree, the eminence of this career is contradicted today by his reputation. Contemporary wisdom describes Griesinger as a synthesizer [End Page 147] rather than an innovator, a man who mixed medical psychology with psychology and psychiatric practice, allowing neurology to take a major role in the treatment of mental disease. 2 In one version, Griesinger simply pulled the clinic and the laboratory together, and so bridged Romanticism (i.e., speculative natural philosophy) and materialism (i.e., empirical science) while failing to effect crucial modern reforms. 3 In other descriptions, Griesinger is identified as an activist (Doerner 1981), a key player in the debates between the Hegelian left and right about the reformulation of public institutions (cf. Verwey 1985), 4 or a typical (but effective) member of the intellectual elite of his age. 5 None of these options explains the attractive or threatening aspects of his clinical practice, or suggests why a psychiatrist of his rank could have been so thoroughly refuted after his death. 6The discussion which follows will try to remedy this lack by setting Griesinger’s approach to mental illness in the context of a transformation of a model from philosophy into medical practice. Griesinger’s scientific context strongly combined philosophical theorizing and empirical practice, a synthesis that later generations tended to denigrate as a “speculative” approach to a branch of medicine that required a more empirical foundation. Drawing on an adaptation of Hegel’s dialectical model of history and... (shrink)

Recent studies have identified two important findings on infants’ capability of taking others’ perspectives and the difficulty of ignoring perspectives irrelevant to the acquired perspective. Unfortunately, there is insufficient consensus on the interpretation of these phenomena. Two important features of perspective-taking, embodiment and aging, should be considered to reach a more appropriate hypothesis. In this paper, the mechanism of perspective-taking can be redefined through the well-known process of self–other distinction, which is inherent to humans, without resorting to either the assumption (...) of controversial systems or an excessive reduction to executive functions. Therefore, it is hypothesized that the implicit mentalizing observed in infancy comes from the loosening phenomenon and lasts lifelong and that the self-representation separated from one’s own body by the detachment function is sent to other perspectives for explicit perspective-taking. This hypothesis can not only explain both the robustness of perspective-taking in the older adults and the appearance of egocentric/altercentric bias in adults but also is consistent with the findings in brain science and neuropathology. Finally, some issues to be considered are presented to improve the validity of this hypothesis. (shrink)

This article will reveal how local scientific determination and ambition, in the face of rejection by funders, navigated a path to success and to influence in national policy and international medicine. It will demonstrate that Birmingham, England's ‘second city’, was the key centre for cutting-edge biological psychiatry in Britain in the 1920s and 1930s. The ambitions of Frederick Mott – doyen of biochemistry, neuropathology and neuropsychiatry, until now celebrated as a London figure – to revolutionize psychiatric treatment through science, chimed (...) with those of the City and University of Birmingham's Joint Board of Research for Mental Diseases. Under Mott's direction, shaped by place and inter-professional working, the board's collaborators included psychiatrist Thomas Chivers Graves and world-renowned physiologist J.S. Haldane. However, starved of external money and therefore fresh ideas, as well as oversight, the ‘groupthink’ that emerged created the classic UK focal sepsis theory which, it was widely believed, would yield a cure for mental illness – a cure that never materialized. By tracing the venture's growth, accomplishments and contemporary potential for biochemical, bacterial and therapeutic discoveries – as well as its links with scientist and key government adviser Solly Zuckerman – this article illustrates how ‘failure’ and its ahistorical assessment fundamentally obscure past importance, neglect the early promise offered by later unsuccessful science, and can even hide questionable research. (shrink)

ObjectivesAbnormal brain function in ASD patients changes dynamically across developmental stages. However, no one has studied the brain function of prepubertal children with ASD. Prepuberty is an important stage for children’s socialization. This study aimed to investigate alterations in local spontaneous brain activity in prepubertal boys with ASD.Materials and MethodsMeasures of the amplitude of low-frequency fluctuations and regional homogeneity acquired from resting-state functional magnetic resonance imaging database, including 34 boys with ASD and 49 typically developing boys aged 7 to 10 (...) years, were used to detect regional brain activity. Pearson correlation analyses were conducted on the relationship between abnormal ALFF and ReHo values and Autism Diagnostic Observation Schedule and Autism Diagnostic Interview-Revised scores.ResultsIn the ASD group, we found decreased ALFF in the left inferior parietal lobule and decreased ReHo in the left lingual gyrus, left superior temporal gyrus, left middle occipital gyrus, and right cuneus. There were negative correlations between ReHo values in the left LG and left STG and the ADOS social affect score and a negative correlation between ReHo values in the left STG and the calibrated severity total ADOS score.ConclusionBrain regions with functional abnormalities, including the left IPL, left LG, left STG, left MOG, and right cuneus may be crucial in the neuropathology of prepubertal boys with ASD. Furthermore, ReHo abnormalities in the left LG and left STG were correlated with sociality. These results will supplement the study of neural mechanisms in ASD at different developmental stages, and be helpful in exploring the neural mechanisms of prepubertal boys with ASD. (shrink)

This superbly written and finery argued philosophical essay has potentially revolutionary importance for understanding "human consciousness, " and its author has accordingly been celebrated by the likes of Oliver Sachs and Karl Pribram. Showing the relevance of neuropathology for understanding the unifying processes behind perception, memory, and language, Jason Brown offers an exciting new approach to the mind/brain problem, freely crossing the boundaries of neurophysiology, psychology, and philosophy of mind. Hard science and the study of the nature of mind (including (...) Buddhist perspectives) come together in new ways, and without advocating the reductionist "computational model" for the mind/brain relation which dominates cognitive science today. Brown finds that every event in conscious life passes through highly determinate stages in a fraction of a second. These repeat both the stages of individual growth and of the evolution of the species: Not only does ontogeny recapitulate phylogeny, but the emergence of every moment of awareness recapitulates them both. This process begins deep in the brain stem with the mere awareness of duration, proceeds through concept-formation and image selection, and terminates with the apprehension of an object in the external world. The external object acts as a realistic constraint on consciousness. But in conditions such as brain damage, dream, meditation, as well as creativity, the preconscious stages enter into direct awareness, giving us explicit glimpses of developmental and evolutionary process and presenting a startling reversal of common ideas about the development of mind. Concept and image do not derive from perception and sensation, theycome first. And the principle of consciousness, rather than being a latecomer on the evolutionary and developmental scene, is a potentiality throughout. This lucidly written book will not disappoint the many readers concerned with the great frontier of scientific exploration -- the nature of consciousness. (shrink)

This paper focuses on the causation of diseases, particularly on the idea of a “genetic cause” taking Alzheimer’s Disease (AD) as an example. We (1) provide some historical information and a synopsis of the current knowledge on the etiology and pathogenesis of AD, (2) analyse some conceptual problems related to the notion of “genetic disease” (3) elaborate on the alleged (genetic) cause of AD, and (4) place the discussion on the cause of AD in a broader philosophical context, paying attention (...) to a constructivist perspective, the notions of causal connection and causal selection, and to some practical and normative consequences of our analysis. We conclude (a) that AD is not a specific disease entity with one specific cause, (b) that the idea of a single (sufficient) cause can still function as a heuristic tool in AD research and practice, and (c) that a “belief” in causation can go together with the notions of multicausality and probability. (shrink)

The article explores conceptual, intentional, and emotional dimensions of art , drawing on ideas from process theory , clinical neuropathology and phenomenology. The interdependence of emotion and perception are outlined, with emphasis on the more general role of knowledge in guiding perception.

Patients with Wilson’s disease suffer from prospective memory impairment, and some of patients develop cognitive impairment. However, very little is known about how brain structure and function changes effect PM in WD. Here, we employed multimodal neuroimaging data acquired from 22 WD patients and 26 healthy controls who underwent three-dimensional T1-weighted, diffusion tensor imaging, and resting state functional magnetic resonance imaging. We investigated gray matter volumes with voxel-based morphometry, DTI metrics using the fiber tractography method, and RS-fMRI using the seed-based (...) functional connectivity method. Compared with HC, WD patients showed GM volume reductions in the basal ganglia and occipital fusiform gyrus, as well as volume increase in the visual association cortex. Moreover, whiter matter tracks of WD were widely impaired in association and limbic fibers. WM tracks in association fibers are significant related to PM in WD patients. Relative to HC, WD patients showed that the visual association cortex functionally connects to the thalamus and hippocampus, which is associated with global cognitive function in patients with WD. Together, these findings suggested that PM impairment in WD may be modulated by aberrant WM in association fibers, and that GM volume changes in the association cortex has no direct effect on cognitive status, but indirectly affect global cognitive function by its aberrant functional connectivity in patients with WD. Our findings may provide a new window to further study how WD develops into cognitive impairment, and deepen our understanding of the cognitive status and neuropathology of WD. (shrink)

In the 1970s, Stella Chess found a high prevalence of autism in children with congenital rubella syndrome (CRS), 200 times that of the general population at the time. Many researchers quote this fact to add proof to the current theory that maternal infection with immune system activation in pregnancy leads to autism in the offspring. This rubella and autism association is presented with the notion that rubella has been eliminated in today’s world. CRS cases are no longer typically seen, yet (...) autistic children often share findings of CRS including deafness, congenital heart defects and to a lesser extent visual changes. Autistic children commonly have hyperactivity and spasticity, as do CRS children. Both autistic and CRS individuals may develop type 1 diabetes as young adults. Neuropathology of CRS infants may reveal cerebral vasculitis with narrowed lumens and cerebral necrosis. Neuroradiologic findings of children with CRS show calcifications, periventricular leukomalacia, and dilated perivascular spaces. Neuroradiology of autism has also demonstrated hyperintensities, leukomalacia and prominent perivascular spaces. PET studies of autistic individuals exhibit decreased perfusion to areas of the brain similarly affected by rubella. In both autism and CRS, certain changes in the brain have implicated the immune system. Several children with autism lack antibodies to rubella, as do children with CRS. These numerous similarities increase the probability of an association between rubella virus and autism. Rubella and autism cross many ethnicities in many countries. Contrary to current belief, rubella has not been eradicated and globally affects up to 5% of pregnant women. Susceptibility continues as vaccines are not given worldwide and are not fully protective. Rubella might still cause autism, even in vaccinated populations. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Ethics CommentaryTamra Lysaght, Senior Research FellowThe case scenario reflects the dilemmas frequently faced by researchers who discover incidental findings in the course of their studies. Indeed, the literature suggests that the prevalence of incidental findings in neuroimaging research is common,1 and a recent meta-analysis found that such findings increase significantly with age.2 Thus, given the age of the study population and increased likelihood of co-morbidities, it is puzzling that (...) the research team did not anticipate the possibility of finding an anomaly. Even more puzzling is that the reviewing IRB did not detect this omission and require that the team build a plan into the research protocol for managing incidental findings. Following international recommendations,3 such a plan would have likely included protocols for obtaining consent in dealing with an incidental finding, a procedure for evaluating the clinical relevance of the finding, and arranging for suitable follow-up care if necessary.Nevertheless, the research team, not having obtained consent to disclose an incidental finding to the participant, or not, must decide whether to break protocol and contact the participant with information that could have serious health implications for his or her health, especially if the observed lesion turns out to be cancer or some other life-threatening neuropathology. Any decision to break the research protocol should be made in consultation with the approving IRB. The principal investigator, Dr. M, who is ultimately responsible for the ethical conduct of this study, has a number of factors to consider when making this decision. First and foremost, Dr. M will need to weigh up the risks and benefits of disclosing the findings to this 72-year-old [End Page 283] research participant who is presumably already experiencing cognitive impairments, if not early stage symptoms of dementia.Numerous international scholars agree that disclosure of incidental findings should rely on the net beneficence to an individual research participant.4 Specifically, Wolf et al. argue that there should be a strong net benefit for disclosing an incidental finding, such that the information reveals a condition that is likely to be either life-threatening or grave and can be avoided or ameliorated through an intervention. In such instances, the researchers have an ethical obligation to disclose the findings and potentially follow up with clinical care. However, if there is only a net possible benefit, such that the condition is not life-threatening but may be grave or serious and cannot be avoided or ameliorated, then investigators may consider other factors, such as the respect that is owed to research participants and their needs and preferences for information about their health and well-being. Where the condition is not likely to be serious, researchers are not compelled to disclose an incidental finding.In determining the seriousness of an incidental finding, a specialist with expertise in assessing the clinical significance of MRI scans is needed to examine the participants’ images.5 In this instance, Dr. M has a neurologist on the research team who has detected the lesion but is unable to ascertain its clinical relevance without further investigation. The reasons why follow-up information is required is not detailed in the case scenario, but may have arisen because the scans were taken for research purposes and may not be clinically validated for diagnostic purposes — a possibility given the aims of the study (i.e., to elucidate the transition of minimal cognitive impairment to dementia, not brain tumours). For whatever reason, the detected lesion is only a suspected incidental finding that may or may not be life-threatening or grave. Thus, the net benefit to the participant in disclosing this unclear finding is harder to judge.Assuming that the lesion is a serious or life-threatening condition, the team may consider whether it can be avoided or ameliorated with an intervention. The cognitively impaired, although still mentally competent, participant is 72 years old and may respond poorly to a neurosurgical intervention if the diagnosis of a tumour or malignancy is confirmed. The physical and emotional distress of such a procedure may exacerbate the existing cognitive impairments, reducing the net benefit ratio of the disclosure. Indeed, the team should consider the impact that the disclosure... (shrink)

In lieu of an abstract, here is a brief excerpt of the content:The Misnomer of Freud's "Seduction Theory"Hall TriplettSigmund Freud's theory of 1896 was buried without a name in 1897, less than two years after it appeared. The process by which it acquired a name, "seduction theory," and the role this name played in the history of psychoanalysis are essential parts of the legend-making in Freud's biography. The label, bestowed half a century after publication, reflected two major rhetorical transformations. First, (...) from a theory presented with highly general claims of infant sex abuse, assault, and trauma, the theory was repackaged as a theory of seduction. Second, from a theory reportedly based in actual, traumatic experience, followed by repressed memory, it was transformed into one of fantasy. The name "seduction theory" has therefore operated as a misleading, strategic misnomer for the theory that Freud published in 1896.Freud announced his theory in three publications, referred to here in order of publication as the Paris paper,1 the Berlin paper,2 and "The Aetiology of Hysteria," published in Vienna.3 In his final publication the emphasis on trauma was greatest. In the space of five pages in the Standard Edition of Freud's works he used the word "traumatic" or "traumatically" fifteen times.4 Although he was extending the traumatic memory theory that he had shared with Josef Breuer in 1895,5 he touted his new modification as "the discovery of a caput [End Page 647] Nili [source of the Nile] in neuropathology."6 Sixteen months later he would privately renounce it. The theory was resurrected in the 1980s as support for the recovered memory movement.7It is essential to recall that the issuance of scientific claims is quite different from scientific validation. Getting the name of a theory right more than a century after publication is one matter only; assessing the basis of its underlying claims raises yet another challenge, particularly when the theory has been transformed with such extensive variation as Freud's theory of 1896.Therefore, the early death of the theory, described only in private letters to Wilhelm Fliess, is critical to an understanding of the entire historical episode. It is essential also to note that when Freud published his retrospective revisions of the theory, he did not know that his contemporary letters to his intimate friend would become competing evidence of the actual events of the mid-1890s.8When Freud secretly abandoned his theory on 21 September 1897 he wrote to Fliess, "I no longer believe in my neurotica."9 Implied already is the fact that Freud's belief in his theory was all that had supported it. One of his retrospective comments unwittingly substantiates this fact. In 1914, in his "History of the Psycho-analytic Movement," he conceded that his theory "broke down under the weight of its own improbability."10Furthermore, abandoning a theory in secrecy with no public defense is itself tantamount to a confession that supporting evidence is missing. Freud had acknowledged the absence of supporting data in his Berlin paper when he stated, "In this kind of communication it is not possible to bring forward the evidence needful to support my assertions, but I hope to fulfill this obligation later in a detailed presentation."11 His claim that it was "not possible to bring forward the evidence" must be challenged. Presenting scientific evidence is always possible when one has it. Moreover, in his "later" paper, by far the longest of 1896, he evaded the presentation of "actual material," opting instead to discuss potential objections.12 He did not present a single case history of hysteria, arguing that this would have taken too much time; yet he had closed his Berlin paper with a case history of paranoia that was purportedly based in the female patient's "sexual relationship" with her brother during childhood.13 [End Page 648] This case is not persuasive, but it demonstrates Freud's eagerness in 1896 to share a case when he believed that he had one to share.The style of a live lecture in "The Aetiology of Hysteria," as though Freud were speaking to an audience of potential objectors, is highly misleading, even fictional. As he explained in his letters... (shrink)

The authors argue that the consciousness debate inhabits the same problem space today as it did in the 17th century. They attribute the lack of progress to a mindset still polarized by Descartes’ real distinction between mind and body, resulting in a standoff between humanistic and scientistic approaches. They suggest that consciousness can be adequately studied only by a multiplicity of disciplines so that the paramount problem is how to integrate diverse disciplinary perspectives into a coherent metatheory. Process philosophy is (...) well qualified to attempt such a synthesis. The rationale for the volume is summed up in the book's unifying thesis: normal, focal-attentive consciousness is not the sui generis phenomenon it is usually taken to be, but part of a wider spectrum of experience (including marginal, deviant, and non-human experience) that can only be studied by approaches as diverse as phenomenology, psycho- and neuropathology, biology, and zoology. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:The Oldest and Most Respected Uniform in the World1Zelig R. Weinstein“And all the peoples of the earth shall see that the name of the LORD is called upon thee; and they shall be afraid of thee.”(Deuteronomy 28:10)Rabbi Eliezer the Great says that this verse alludes to the Tefillin Shel Rosh, the small leather box containing Biblical verses that are worn by Jewish men on their head. During Talmudic times (...) and for centuries after, devout Jewish men would wear Tefillin the entire day. This practice is now only rarely seen. Since the 1960s, there has been a resurgence of public display of one’s adherence to traditional Jewish practices. It is increasingly common to see Jewish men wearing a yarmulke at work and in public spheres. There are perhaps thousands of Jewish doctors who don’t hesitate to wear their yarmulke in their places of practice–hospital, clinic, private practice.In the 1980s I joined the staff of the Department of Radiology at the Bethesda Naval Hospital as the Director of Neuroradiology and Interventional Radiology. As the hospital’s Neuroradiologist I presented the radiological findings for the cases presented at the bimonthly “brain cutting” sessions. These sessions were well attended by staff, residents and medical students from the Departments of Neurosurgery, Neurology, Neuropathology and Radiology. I was the only traditional Orthodox Jew at the hospital, clearly recognizable as such by the yarmulke I always wore (very unusual in the early 1980s). My yarmulke would provoke occasional good–natured kidding particularly from the neurosurgery staff and residents. [End Page 212]During one of these sessions, kidding about my yarmulke from a small group of residents was reaching a crescendo. The kidding came to a sudden halt when the Chief Resident of Neuro-surgery, a born and bred Louisianan, demanded everyone’s attention. When it quieted down he very sternly ordered everyone to carefully look at their uniforms. Everyone seemed perplexed but all followed suit. Almost a half–minute passed before the Chief Resident, with his thick Southern drawl, spoke. “Our [naval] uniforms are, at most, a couple of hundred years old.” He then pointed toward my yarmulke and said: “Dr. Weinstein’s uniform is thousands of years old and a lot more respected than our uniforms.”This was my initiation into the alluring, usually positive and unexpected fascination and respect that my obvious religiosity had on my patients, their families and my many colleagues during the almost seven years I spent at Bethesda.The story I will tell is very poignant. It involved the family of one of the most senior Chief Petty Officers of the United States Navy.Late one Sunday evening, I received a call from the Chief Resident, Dr. Steve Henning, informing me that the family matriarch had been admitted to Bethesda with relatively acute onset of significant neurological findings. The emergent workup confirmed the presence of a large mass, a meningioma, of the frontal lobe region with significant surrounding edema and mass effect. Neurosurgery requested embolization of the feeding vessels prior to surgery. The interventional procedure and possible serious complications were fully explained to the patient, her husband and her two daughters. Consent was signed and early Monday morning the patient was brought to Special Procedures to have the tumor embolized.Prior to the procedure I introduced myself to the patient’s family and spoke to them about the procedure. The patient’s husband and two daughters, one of whom was an active duty Navy nurse the other a minister of a fundamentalist church in the South, were very attentive and expressed concern about the procedure and its outcome. I tried to reassure them and told them I would speak to them during and after the procedure.All went well. Medically, the patient did well during and after the procedure. She was discharged from our care to neurosurgery. The patient and her family thanked us.After the patient left the Special Procedures area the Chief Technologist, Al, approached me and very cryptically asked if I was aware of what happened when the Chief Resident, Dr. Henning, spoke with the patient and family the night before. I was puzzled and replied, no. He... (shrink)

Adenosine 5′-triphosphate (ATP) was identified in 1970 as the transmitter responsible for non-adrenergic, non-cholinergic neurotransmission in the gut and bladder and the term ‘purinergic’ was coined. Purinergic cotransmission was proposed in 1976 and ATP is now recognized as a cotransmitter in all nerves in the peripheral and central nervous systems. P1 (adenosine) and P2 (ATP) receptors were distinguished in 1978. Cloning of these receptors in the early 1990s was a turning point in the acceptance of the purinergic signalling hypothesis. There (...) are both short-term purinergic signalling in neurotransmission, neuromodulation and secretion and long-term (trophic) purinergic signalling of cell proliferation, differentiation and death in development and regeneration. Much is known about the mechanisms of ATP release and its breakdown by ectonucleotidases. Recently, there has been emphasis on purinergic pathophysiology, including neurodegenerative and neuropsychiatric disorders. Purinergic therapeutic strategies are being developed for treatment of gut, kidney, bladder, lung, skeletal and reproductive system disorders, pain and cancer. (shrink)

Disturbances of consciousness, including fluctuations in attention and awareness, are a common and clinically important symptom in dementia with Lewy bodies. In the present study we investigate potential mechanisms of such disturbances of consciousness in a clinicopathological study evaluating specific components of the cholinergic system. [3H]Epibatidine binding to the high-affinity nicotinic receptor in the temporal cortex differentiated DLB cases with and without DOC, being 62–66% higher in those with DOC. The were no differences between DLB patients with or without DOC (...) in 125I-labeled α-bungaratoxin binding to the low-affinity nicotinic receptor, [3H]pirenzepine binding to the muscarinic M1 receptor, or in choline acetyltransferase activity. These findings provide support for the hypothesis that cholinergic activity is an important neural correlate if consciousness and suggest a mechanism of DOC in DLB involving alterations in the nicotinic receptor, composed of predominantly α4 and β2 subunits. (shrink)

This essay reconstructs the steps by which Cassirer moved from the philosophy of language in the early 1920s to his more general theory of symbolism. The linguistic turn in philosophy overcame idealism without falling into naturalism or psychologism, but according to Cassirer proclaiming the primacy of language was one-sided. He claimed that language is but one symbolic form among many and, what is more, it is not the most fundamental kind of symbolism. The basic function of symbolism is neither "reference" (...) nor "pure signification," but the unification of sensory phenomena in perception, a function he termed symbolic "Prägnanz." The essay explains how Cassirer argued for a continuity of symbolic processes linking expressive perceptual qualities with scientific theory. (shrink)

Studies have shown that both serotonin and glutamate receptor systems play a crucial role in the mechanisms underlying drug-induced synesthesia. The specific nature of these mechanisms, however, continues to remain elusive. Here we propose two distinct hypotheses for how synesthesia triggered by hallucinogens in the serotonin-agonist family may occur. One hypothesis is that the drug-induced destabilization of thalamic projections via GABAergic neuronal circuits from sensory areas leads to a disruption of low-level, spontaneous integration of multisensory stimuli. This sort of integration (...) regularly occurs when spatial and temporal attributes match. Destabilization of feedback loops, however, can result in incongruent experiences or binding of random thalamus activation with sensory input in a particular sensory modality. The second hypothesis builds on embodied cognition, cases in which visual images of external stimuli activate task-related neural regions. On this proposal, binding processes that do not normally generate awareness become accessible to consciousness as a result of decreased attentional discrimination among incoming stimuli. (shrink)

Over the past few years numerous proposals have appeared that attempt to characterize consciousness in terms of what could be called its computational correlates: Principles of information processing with which to characterize the differences between conscious and unconscious processing. Proposed computational correlates include architectural specialization (such as the involvement of specific regions of the brain in conscious processing), properties of representations (such as their stability in time or their strength), and properties of specific processes (such as resonance, synchrony, interactivity, or (...) information integration). In exactly the same way as one can engage in a search for the neural correlates of consciousness, one can thus search for the computational correlates of consciousness. The most direct way of doing is to contrast models of conscious versus unconscious information processing. In this paper, I review these developments and illustrate how computational modeling of specific cognitive processes can be useful in exploring and in formulating putative computational principles through which to capture the differences between conscious and unconscious cognition. What can be gained from such approaches to the problem of consciousness is an understanding of the function it plays in information processing and of the mechanisms that subtend it. Here, I suggest that the central function of consciousness is to make it possible for cognitive agents to exert ?exible, adaptive control over behavior. From this perspective, consciousness is best characterized as involving (1) a graded continuum de?ned over quality of representation, such that availability to consciousness and to cognitive control correlates with properties of representation, and (2) the implication of systems of meta-representations. (shrink)