It is widely held that there is an important distinction between the notion of consciousness as it is applied to creatures and, on the other hand, the notion of consciousness as it applies to mental states. McBride has recently argued in this journal that whilst there may be a grammatical distinction between state consciousness and creature consciousness, there is no parallel ontological distinction. It is argued here that whilst state consciousness and creature (...) class='Hi'>consciousness are indeed related, they are distinct properties. Conscious creatures can have, at one time, both conscious and unconscious mental states. This raises the question of what distinguishes the conscious from unconscious mental states of a subject: a question about what state consciousness consists in. Whilst the state/creature distinction may not be of use in explaining every aspect of a subject's consciousness, it does provide a key part of the explanandum for theories of consciousness and mind. The state/creature consciousness distinction is a real one and should not be dropped from our psychological taxonomy. (shrink)

I discuss here the nature of nonconscious mental states and the ways in which they may differ from their conscious counterparts. I first survey reasons to think that mental states can and often do occur without being conscious. Then, insofar as the nature of nonconscious mentality depends on how we understand the nature of consciousness, I review some of the major theories of consciousness and explore what restrictions they may place on the kinds of states that can occur (...) nonconsciously. I close with a discussion of what makes a state mental, if consciousness is not the mark of the mental. (shrink)

I try to reconcile Dretske's representational theory of conscious mental states with Rosenthal's higher-order thought (HOT) theory of conscious mental states by arguing that Rosenthal's HOT can make room for the notion of a state of consciousness whereby an invidual may be conscious of an object or property without thereby being conscious of being in such a state.

One of the central assumptions made in much of contemporary philosophy of mind is that there is no appearance-reality distinction when it comes to sensory states. On this assumption, sensory states simply are as they seem: consciousness is an intrinsic property of sensory states—that is, all sensory states are conscious—and the consciousness of one’s own sensory states is never inaccurate. For a sensation to be felt as pain, for example, is for it to be pain. This assumption, which (...) I call the Cartesian assumption, can be seen everywhere from the standard arguments against physicalism—such as those advanced by Kripke, Nagel, and Levine—to current theorizing about consciousness. I here argue that this assumption is false and that it goes wrong in two ways. I further argue that the appeal of the Cartesian assumption is due to a commitment many still have to a poorly motivated and misguided Cartesian model of consciousness and its relation to mental states. As an alternative to this Cartesian concept of mind, I argue for a theory of consciousness which claims that the “phenomenal character” of a sensation or perception—the “what it’s like” to have that sensation—is determined by the content of a higher-order thought one has of that sensory state. (shrink)

Are conscious states conscious in virtue of representing themselves? Content Type Journal Article Pages 1-8 DOI 10.1007/s11098-011-9762-x Authors Berit Brogaard, Department of Philosophy, University of Missouri, St. Louis, 599 Lucas Hall, One University Blvd., St. Louis, MO 63121-4400, USA Journal Philosophical Studies Online ISSN 1573-0883 Print ISSN 0031-8116.

An important distinction lies between consciousness attributed to creatures, or subjects, (creature consciousness) and consciousness attributed to mental states (state consciousness). Most contemporary theories of consciousness aim at explaining what makes a mental state conscious, paying scant attention to the problem of creature consciousness. This attitude relies on a deeper, and generally overlooked, assumption that once an explanation of state consciousness is provided, one has also explained all the relevant features (...) of creature consciousness. I call this the priority of state consciousness thesis (PSC). In this paper, I want to explore how the renewed centrality bestowed to phenomenology in contemporary discussions on consciousness challenges PSC and, consequently, the standard way of framing the problem of consciousness. More precisely, I examine PSC in light of a view about the structure of phenomenal character that is paradigmatic of the approach above. This is subjectivism about phenomenal character (SUBJ), according to which a mental state is conscious when it acquires the property of for-me-ness. I argue that PSC and SUBJ are incompatible because the latter implies that creature consciousness is explanatorily prior to state consciousness. Consequently, if SUBJ is true, then PSC is false, and what constitutes the problem of consciousness is primarily a problem of explaining (a kind of) creature consciousness. I conclude by defending my claim from a pair of possible objections and drawing some implications for the discussion of for-me-ness and the debate on the explanation of consciousness. (shrink)

What altered states of consciousness—the dissolution of feelings of time and self—can tell us about the mystery of consciousness. During extraordinary moments of consciousness—shock, meditative states and sudden mystical revelations, out-of-body experiences, or drug intoxication—our senses of time and self are altered; we may even feel time and self dissolving. These experiences have long been ignored by mainstream science, or considered crazy fantasies. Recent research, however, has located the neural underpinnings of these altered states of mind. In (...) this book, neuropsychologist Marc Wittmann shows how experiences that disturb or widen our everyday understanding of the self can help solve the mystery of consciousness. Wittmann explains that the relationship between consciousness of time and consciousness of self is close; in extreme circumstances, the experiences of space and self intensify and weaken together. He considers the emergence of the self in waking life and dreams; how our sense of time is distorted by extreme situations ranging from terror to mystical enlightenment; the experience of the moment; and the loss of time and self in such disorders as depression, schizophrenia, and epilepsy. Dostoyevsky reported godly bliss during epileptic seizures; neurologists are now investigating the phenomenon of the epileptic aura. Wittmann describes new studies of psychedelics that show how the brain builds consciousness of self and time, and discusses pilot programs that use hallucinogens to treat severe depression, anxiety, and addiction. If we want to understand our consciousness, our subjectivity, Wittmann argues, we must not be afraid to break new ground. Studying altered states of consciousness leads us directly to the heart of the matter: time and self, the foundations of consciousness. (shrink)

Some of my mental states are conscious and some of them are not. Sometimes I am so focused on the wine in front of me that I am unaware that I am thinking about it; but sometimes, of course, I take a reflexive step back and become aware of my thinking about the wine in front of me. What marks the difference between a conscious mental state and an unconscious one? In this paper, I focus on Durand of St.-Pourçain’s (...) rejection of the higher-order theory of state consciousness, according to which a mental act is conscious when there is another, suitably related, mental (reflex) act that exists at the same time with it. Durand rejects such higher-order theories on the grounds that they violate the thesis that a given mental power can have or elicit only one mental act at a given time. I first go over some of Durand’s general arguments for this thesis. I then turn to Durand’s application of the thesis to the issue of state consciousnes and reflex acts. I close by considering the objection that Durand’s same-order theory of state consciousness makes consciousness ubiquitous. (shrink)

Explanation does not exist in a metaphysical vacuum. Conceptions of the structure of a phenomenon play an important role in guiding attempts to explain it, and erroneous conceptions of a phenomenon may direct investigation in misleading directions. I believe that there is a case to be made for thinking that much work on the neural underpinnings of consciousness—what is often called the neural correlates of consciousness—is driven by an erroneous conception of the structure of consciousness. The aim (...) of this paper is lay bare some connections between the explanation of consciousness and the structure of consciousness, and to argue for a conception of the structure of consciousness that is more adequate than that which currently drives much research into the neural correlates of consciousness. (shrink)

David Rosenthal's higher-order thought theory is one of the most widely argued for of the higher-order accounts of consciousness. I argue that Rosenthal vacillates between two models of the HOT theory. First, I argue that these models employ different concepts of 'state consciousness'; the two concepts each refer to mental state tokens, but in virtue of different properties. In one model, the concept of 'state consciousness' is more consistent with how the term is typically (...) used, both by philosophers and scientists, and in commonsense usage. This model, however, also has its problems. In the second part of the paper, I develop a modified version of Rosenthal's transitivity principle, thereby avoiding some complications that stem from the original transitivity principle. I suggest that Rosenthal occasionally employs this modified model himself, and that the inconsistency identified in the first section of this paper might really reflect Rosenthal's vacillation between these two versions of the transitivity principle. I offer one explanation for how this equivocation may have occurred. These two versions would result if articulations of the transitivity principle employed the term 'mental state' inconsistently, to refer on some occasions merely to mental state types, and on others, to tokened mental states. I conclude by arguing, contrary to Rosenthal and others, that the theory is not incompatible with view that conscious states are uniquely casual efficacious. (shrink)

Philosophy and anaesthesiology are disciplines that are rarely associated despite their respective interests in human consciousness. In this paper, we consider the advantages of integrating anaesthesiology and philosophy in the endeavour of discovering the neural correlates of state consciousness. We venture the following twopart argument. First, we argue that philosophical debates about the correlation conditions for state consciousness can be improved by focusing on how anaesthesiologists actually measure and study consciousness in practice. We present (...) Integrated Information Theory as a promising framework for discriminating features hitherto considered relevant to the identification of the neural correlates of state consciousness. Second, we argue that an improved philosophical understanding of what comprises the correlation conditions for state consciousness can, in turn, advance anaesthesiological methodologies; not only can it improve how potential evidence is gathered and assessed, but it can aid in the prevention of intraoperative awareness, increasing patient safety and well-being. (shrink)

Realism about consciousness conjoins a claim that consciousness exists with a claim that the existence is independent in some interesting sense. Consciousness realism so conceived may thus be opposed by a variety of anti-realisms, distinguished from each other by denying the first, the second, or both of the realist’s defining claims. I argue that Dennett’s view of consciousness is best read as an anti-realism that affirms the existence of consciousness while denying an important independence claim.

In his recent work, Dretske offers a new account of what it is for a mental state, in particular, a sensory experience, to be conscious. According to Dretske’sproposal, subject S’s experience of object O is conscious if and only if it makes S aware of O. This proposal is argued to be open to only two serious interpretations. The first takes it to mean that S’s experience of O is conscious if and only if it constitutes S’s awareness of (...) O, whereas the second takes it to mean that S’s experience of O is conscious if and only if it causes S’s awareness of O. It is argued that neither is a plausible way to understand the nature of state consciousness, because the constitutive interpretation implausibly denies the existence of unconscious veridical experiences, whereas the causal interpretation implausibly casts S’s veridical experience of O, rather than O or a certain external event involving O, as the relevant cause of S’s awareness of O. (shrink)

In a series of closely connected papers, Rosenthal has defended what has come to be known as “the higher-order thought theory of state-consciousness.” According to this theory, a mental state which one instantiates is conscious if and only if one is conscious of being in it in some relevant way, and one’s being conscious of being in the state which is conscious consists in one’s having a contemporaneous thought to the effect that one is in that (...) state. The main aim of this paper is to disarm a Searle-style objection to Rosenthal’s account of state-consciousness, one that takes mentality, in particular intentionality, to presuppose state-consciousness. It is argued that the Searlean attempt to convict Rosenthal’s hypothesis of circularity fails, because the postulation of what Searle called “subjective ontology,” as well as the requirement that there be an uncancelable connection between mode of representation and state-consciousness, is unreasonable. While defending Rosenthal against Searle, this paper also aims to develop a fresh objection to the higher-order thought conception of state-consciousness. (shrink)

Recently, brain imaging has provided controversial evidence of persisting awareness in some people whose brains are so severely injured that consciousness is minimal or absent, but in whom prolongation of life depends on the provision of continuing medical care. The clinicians understanding of the persistent vegetative state is briefly outlined and the evidence provided by brain imaging of awareness in this condition is reviewed. Information regarding consciousness in progressive acquired dementias are considered in the context of management (...) of these conditions. This leads to the conclusion that quality of consciousness was more important than its presence or absence in managing people with impaired consciousness. (shrink)

In his recent work, Dretske offers a new account of what it is for a mental state, in particular, a sensory experience, to be conscious. According to Dretske’sproposal, subject S’s experience of object O is conscious if and only if it makes S aware of O. This proposal is argued to be open to only two serious interpretations. The first takes it to mean that S’s experience of O is conscious if and only if it constitutes S’s awareness of (...) O, whereas the second takes it to mean that S’s experience of O is conscious if and only if it causes S’s awareness of O. It is argued that neither is a plausible way to understand the nature of state consciousness, because the constitutive interpretation implausibly denies the existence of unconscious veridical experiences, whereas the causal interpretation implausibly casts S’s veridical experience of O, rather than O or a certain external event involving O, as the relevant cause of S’s awareness of O. (shrink)

In a series of closely connected papers, Rosenthal has defended what has come to be known as “the higher-order thought theory of state-consciousness.” According to this theory, a mental state which one instantiates is conscious if and only if one is conscious of being in it in some relevant way, and one’s being conscious of being in the state which is conscious consists in one’s having a contemporaneous thought to the effect that one is in that (...) state. The main aim of this paper is to disarm a Searle-style objection to Rosenthal’s account of state-consciousness, one that takes mentality, in particular intentionality, to presuppose state-consciousness. It is argued that the Searlean attempt to convict Rosenthal’s hypothesis of circularity fails, because the postulation of what Searle called “subjective ontology,” as well as the requirement that there be an uncancelable connection between mode of representation and state-consciousness, is unreasonable. While defending Rosenthal against Searle, this paper also aims to develop a fresh objection to the higher-order thought conception of state-consciousness. (shrink)

Recently, Peter Carruthers has advanced the debate over first-order representationalist theories and higher-order representationalist theories of consciousness by offering two innovative arguments in support of dispositionalist HORs. In this article, I offer a limited defense of actualist FORs by showing that Carruthers' two arguments either beg the question against such accounts, equivocate on important concepts, or rest on suspect claims about our abilities to attribute phenomenal consciousness to animals. In addition, I argue that dispositionalist HORs face an apparent (...) counterexample, one which Carruthers does not consider. (shrink)

This essay examines the grammatical structure underlying the use of the word "conscious". Despite the existence of this grammatical structure, I reject the assumption that actual consciousness has a similar structure. Specifically, I reject the claim that consciousness consists of three subtypes: state consciousness, transitive consciousness, and creature consciousness. I offer an inductive argument and a deductive argument that no such psychological entities exist. The inductive argument: given the lack of evidence or arguments for (...) the entities and given that a tripartite consciousness structure evolved from a tripartite grammatical habit, it would be far too coincidental if the grammatical distinction mirrored a psychological distinction. The deductive argument shows that absurd conclusions follow from assuming the existence of three distinct psychological entities. Furthermore, the verbal habits that motivate the distinction are rendered more intelligible under a "Unitary Thesis", the idea that verbal distinctions involving use of the word "conscious" are unified in their reliance on a single ontological unit, that of conscious experience. (shrink)

According to Rosenthal's higher-order thought (HOT) theory of consciousness, one is in a conscious mental state if and only if one is aware of oneself as being in that state via a suitable HOT. Several critics have argued that the possibility of so-called targetless HOTs?that is, HOTs that represent one as being in a state that does not exist?undermines the theory. Recently, Wilberg (2010) has argued that HOT theory can offer a straightforward account of such cases: (...) since consciousness is a property of mental state tokens, and since there are no states to exhibit consciousness, one is not in conscious states in virtue of targetless HOTs. In this paper, I argue that Wilberg's account is problematic and that Rosenthal's version of HOT theory, according to which a suitable HOT is both necessary and sufficient for consciousness, is to be preferred to Wilberg's account. I then argue that Rosenthal's account can comfortably accommodate targetless HOTs because consciousness is best understood as a property of individuals, not a property of states. (shrink)

In a recent issue of Neuroethics, I considered whether the notion of human dignity could help us in solving the moral problems the advent of the diagnostic category of minimally conscious state (MCS) has brought forth. I argued that there is no adequate account of what justifies bestowing all MCS patients with the special worth referred to as human dignity. Therefore, I concluded, unless that difficulty can be solved we should resort to other values than human dignity in addressing (...) the moral problems MCS poses. In his new book Christopher Kaczor criticizes the argument I put forward. Below, I respond to Kaczor’s criticism. I maintain that the considerations he presents do not undermine my argument nor succeed in providing adequate justification for the view that all MCS patients possess the worth referred to as human dignity. (shrink)

"A beautiful piece of work on the theory of altered states of consciousness ." "Stanislav Grof, M.D. author of Realms of the Human Unconsciousness".

Self-consciousness and the self -- Diachronic unity, diachronic singularity, and the subject of consciousness -- A modal argument for immateriality -- Intelligibility concerns and causal objections -- Concluding remarks.

Some vegetative state patients show fMRI responses similar to those of healthy controls when instructed to perform mental imagery tasks. Many authors have argued that this provides evidence that such patients are in fact conscious, as response to commands requires intentional agency. I argue for an alternative reading, on which responsive patients have a deficit similar to that seen in severe forms of akinetic mutism. Akinetic mutism is marked by the inability to form and maintain intentions to act. Responsive (...) patients are likely still conscious. However, the route to this conclusion does not support attributions of intentional agency. I argue that aspects of consciousness, rather than broad diagnostic categories, are the more appropriate target of empirical investigation. Investigating aspects of consciousness provides a better method for investigating profound disorders of consciousness. 1 Introduction2 Responses in the Vegetative State2.1 The imaging evidence2.2 The need for models3 Responsive Patients and Akinetic Mutism3.1 Akinetic mutism3.2 Akinetic mutism as a deficit in intentions3.3 Arguments for the link3.4 Interim conclusion4 Other Models4.1 A deficit in ability?4.2 Modular intentions?5 Consciousness and Method5.1 Are they conscious?5.2 Aspects versus levels. (shrink)

The concept of futility is sometimes regarded as a cloak for medical paternalism in that it rolls together medical and value judgments. Often, despite attempts to disambiguate the concept, that is true and it can be applied in such a way as to marginalize the real interests of a patient. I suggest we replace it with a conceptual toolkit that includes physiological futility, substantial benefit (SB), and the risk of unacceptable badness (RUB) in that these concepts allow us to articulate (...) what is at stake in ethical judgments where outcomes are crucial in determining what should be done. (shrink)

Conscious states as objects of awareness: on Uriah Kriegel, Subjective consciousness: a self - representational theory Content Type Journal Article Pages 1-9 DOI 10.1007/s11098-011-9763-9 Authors Brie Gertler, Corcoran Department of Philosophy, University of Virginia, Charlottesville, VA 22904, USA Journal Philosophical Studies Online ISSN 1573-0883 Print ISSN 0031-8116.

Recent progress in neurosciences has improved our understanding of chronic disorders of consciousness. One example of this advancement is the emergence of the new diagnostic category of minimally conscious state (MCS). The central characteristic of MCS is impaired consciousness. Though the phenomenon now referred to as MCS pre-existed its inclusion in diagnostic classifications, the current medical ethical concepts mainly apply to patients with normal consciousness and to non-conscious patients. Accordingly, how we morally should stand with persons (...) in minimally conscious state remains unclear. In this paper, I examine whether the notion of human dignity could provide us with guidance with the moral difficulties MCS gives rise to. More precisely, I focus on the question of whether we are justified in holding that persons in minimally conscious state possess human dignity. (shrink)

Consciousness in experimental subjects is typically inferred from reports and other forms of voluntary behaviour. A wealth of everyday experience confirms that healthy subjects do not ordinarily behave in these ways unless they are conscious. Investigation of consciousness in vegetative state patients has been based on the search for neural evidence that such broad functional capacities are preserved in some vegetative state patients. We call this the standard approach. To date, the results of the standard approach (...) have suggested that some vegetative state patients might indeed be conscious, although they fall short of being demonstrative. The fact that some vegetative state patients show evidence of consciousness according to the standard approach is remarkable, for the standard approach to consciousness is rather conservative, and leaves open the pressing question of how to ascertain whether patients who fail such tests are conscious or not. We argue for a cluster-based ‘natural kind’ methodology that is adequate to that task, both as a replacement for the approach that currently informs research into the presence or absence of consciousness in vegetative state patients and as a methodology for the science of consciousness more generally. 1. Introduction2. The Vegetative State3. The Standard Approach4. The Natural Kind Methodology5. Is Consciousness a Special Case? 5.1 Is consciousness a natural kind?5.2 A special obstacle?6. Conclusion. (shrink)

In this paper, we review recent neuroimaging investigations of disorders of consciousness and different disciplines' understanding of consciousness itself. We consider potential tests of consciousness, their legal significance, and how they map onto broader themes in U.S. statutory law pertaining to advance directives and surrogate decision-making. In the process, we outline a taxonomy of themes to illustrate and clarify the variance in state-law definitions of consciousness. Finally, we discuss broader scientific, ethical, and legal issues associated (...) with the advent of neuroimaging for disorders of consciousness and conclude with policy recommendations that could help to mitigate confusion in this realm. (shrink)

Recent studies indicate that patients who are diagnosed with vegetative states may retain more awareness than their clinical assessments suggest. Disorders of consciousness traditionally have been diagnosed on the basis of outwardly observable behaviors alone, but new functional imaging studies have shown surprising levels of brain activity in some patients, indicating that even higher-level cognitive functions like language processing and visual imagery may be preserved. For example, one recently developed method purports to detect voluntary mental imagery solely on the (...) basis of neural response patterns observed with functional magnetic resonance imaging. This line of research has already led to some widely reported cases of patients who were discovered to have more brain activity than expected. In November 2009, Rom Houben, a Belgian man who was thought to be in a coma for 23 years, was diagnosed with locked-in syndrome through the use of neuroimaging; however, that assessment was later overturned by further testing. (shrink)

The purpose of the paper is to analyze the distinction between conscious and unconscious mental states, as when people say "Admittedly I did X, but I wasn't conscious of it." It is argued that "unconscious" varieties of mental states, processes, or events---even perception---can be analyzed entirely in terms of the possession, exercise, acquiring, or loss, of dispositions, whereas conscious mental states involve the same dispositional items, temporally conjoined with at least one of a variety of appropriate experiences. The "temporal conjunction" (...) relationship between behavior and "appropriate" experiences turns out to be much looser than recent causal or functional theories of mental concepts have allowed; the views of e.g., David Armstrong and Daniel Dennett are critically discussed. (shrink)

Understanding loss of consciousness after brain injury poses a practical test for the field of consciousness research, with both clinical and ethical implications. We here discuss three major pathological disorders of consciousness; coma, the unresponsive wakefulness syndrome and the minimally conscious state, which together represent a lesion model for the investigation of human awareness. We review the anatomical and neurophysiological correlates of each condition, and discuss the current findings in context of several theoretical frameworks of (...) class='Hi'>consciousness. (shrink)

Consciousness6 carries the connotation of a state of consciousness . It is an emergent property of a gestalt phenomenon, namely the psychophysiological state of the organism . In this article, I extend my previous discussion of states of consciousness , embedding this within the wider perspective of both Gestalt psychology and psychoanalytic ego psychology. Gestalt notions, such as Prägnanz and microgenesis, are shown to be highly relevant to this theme. Natsoulas’ recent appraisal of my viewpoint has (...) goaded me into reiterating the argument for looking at a qualitative change in thought, characterizing the shift in consciousness6, as being a promising area for further development. This hypothesized change in mode of thinking is of a metaphoric—symbolic nature, what such authors as Hunt and Haskell would term symbolic cognition. I discuss the relationships among perceptual experience, symbolic cognition and state of consciousness, concluding with some comments on Natsoulas’ reservations. (shrink)

I draw attention to an ambiguity of the expression ‘phenomenal consciousness’ that is an avoidable yet persistent source of conceptual confusion among consciousness scientists. The ambiguity is between what I call phenomenality and what I call conscious states, where the former denotes an abstract property and the latter denotes a phenomenon or class of its instances. Since sentences featuring these two terms have different semantic properties, it is possible to equivocate over the term ‘consciousness’. It is also (...) possible to fail to distinguish between statements that are true about conscious states in virtue of their phenomenality, and statements that are true in virtue of other properties of conscious states. I review empirically informed arguments by scientists Bernard Balleine and Anthony Dickinson, Stevan Harnad, and Jeffrey Alan Gray, arguing that each of them makes errors based on the ambiguity. I conclude with some tentative suggestions for avoiding further confusion about the ambiguity. (shrink)

It is the central hypothesis of this paper that the mental states commonly referred to as altered states of consciousness are principally due to transient prefrontal cortex deregulation. Supportive evidence from psychological and neuroscientific studies of dreaming, endurance running, meditation, daydreaming, hypnosis, and various drug-induced states is presented and integrated. It is proposed that transient hypofrontality is the unifying feature of all altered states and that the phenomenological uniqueness of each state is the result of the differential viability (...) of various frontal circuits. Using an evolutionary approach, consciousness is conceptualized as hierarchically ordered cognitive function. Higher-order structures perform increasingly integrative functions and thus contribute more sophisticated content. Although this implies a holistic approach to consciousness, such a functional hierarchy localizes the most sophisticated layers of consciousness in the zenithal higher-order structure: the prefrontal cortex. The hallmark of altered states of consciousness is the subtle modification of behavioral and cognitive functions that are typically ascribed to the prefrontal cortex. The theoretical framework presented yields a number of testable hypotheses. (shrink)

States of being conscious (S) can be defined on the basis of temporal information processing. A high-frequency mechanism provides atemporal system states with periods of approximately 30 msec to implement the functional connection of distributed activities allowing the construction of primordial events; a low frequency mechanism characterized by automatic temporal integration sets up temporal windows with approximately 3 seconds duration. This integration mechanism can be used to define S. P-consciousness and A-consciousness as conceived of by Block can be (...) mapped onto these neuronal mechanisms. (shrink)

Explores deep sleep (susupti), one of the three states of consciousness in Advaita Vedanta, and the major role it plays in this philosophy.

This paper is part of a comprehensive research project whose aim is to study the phenomenology of the special state of mind induced by the psychoactive Amazonian potion ayahuasca. Here, I focus on those aspects of the ayahuasca experience that are related to basic features of the human consciousness. The effects of the potion are discussed in terms of a conceptual framework characterizing consciousness as a cognitive system defined by a set of parameters and the values that (...) they take. In various theoretical contexts, these values have been assumed to be basic, paradigmatic properties of human consciousness. The phenomenological data pertaining to ayahuasca indicate that the features at hand can be modified. Following earlier suggestions by William James and Aldous Huxley, I conclude that any general theory of consciousness should be based not only on the study of so-called ordinary consciousness, but also on that of non-ordinary states. (shrink)

Patients in a minimally conscious state (MCS) fall into a different diagnostic category than patients in the more familiar vegetative states (VS). Not only are MCS patients conscious in some sense, they have a higher chance for recovery than VS patients. Because of these differences, we ostensibly have reason to provide MCS patients with care that goes beyond what we provide to patients with some VS patients. But how to justify this differential treatment? I argue we can’t justify it (...) solely by looking to MCS patients’ actual levels of consciousness. We must look also to the ways in which these patients are potentially conscious. Specifically, I argue that certain sensible and well-regarded policy recommendations cannot be justified by looking solely to patients’ actual levels of consciousness, but that they can be justified by looking to patients’ potential for consciousness. Insofar then as we have prima facie reason to follow the recommendations, we also have prima facie reason to view the potential for consciousness as morally salient. If that is true, however, several important implications follow: first, if the potential for consciousness is morally salient, this translates into actual and pressing obligations to patients with disorders of consciousness generally. Second, if the potential for consciousness is morally salient, this has implications that go beyond our obligations to patients with disorders of consciousness. Indeed, if the potential for consciousness is morally salient, this adds an important layer of complexity to the normative landscape, a layer we may not have sufficiently noticed before. (shrink)

One of the final obstacles to understanding consciousness in physical terms concerns the question of whether conscious states can exist in posterior regions of the brain without active connections to the brain's prefrontal lobes. If they can, difficult issues concerning our knowledge of our conscious states can be resolved. This paper contains a list of types of conscious states that may meet this criterion, including states of coma, states in which subjects are absorbed in a perceptual task, states in (...) brains with damaged prefrontal lobes, states of meditation and conscious states of some infants and animals. Recent evidence also suggests that conscious states of some people with autism may meet this criterion. (shrink)

The viewpoint that consciousness, including feeling, could be fully expressed by a computational device is known as strong artificial intelligence or strong AI. Here I offer a defense of strong AI based on machine-state functionalism at the quantum level, or quantum-state functionalism. I consider arguments against strong AI, then summarize some counterarguments I find compelling, including Torkel Franzén’s work which challenges Roger Penrose’s claim, based on Gödel incompleteness, that mathematicians have nonalgorithmic levels of “certainty.” Some consequences of (...) strong AI are then considered. A resolution is offered of some problems including John Searle’s Chinese Room problem and the problem of consciousness propagation under isomorphism. (shrink)