Consciousness and Neuroscience

In response to our recent claim that ‘Readers are parallel processors’, our peers have voiced several ideas that will undoubtedly help illuminate the road to scientific consensus about the reading brain. Schotter and Payne echo our plea for bridging traditionally isolated literatures. In terms of theory, our model OB1-reader is one attempt to do just that: specifically, it bridges the domains of single word recognition and eye movements in text reading. Equally important is the integration of methodologies, of which Schotter (...) and Payne highlight an excellent instance – the combination of eye-tracking and electroencephalography, which arguably provides a more direct window onto the cognitive processes driving reading while ecologically approximating a natural setting. We trust that such set ups will help verify whether the cognitive architecture as inferred with artificial paradigms indeed pertains to natural reading. (shrink)

Our access to computer-generated worlds changes the way we feel, how we think, and how we solve problems. In this review, we explore the utility of different types of virtual reality, immersive or non-immersive, for providing controllable, safe environments that enable individual training, neurorehabilitation, or even replacement of lost functions. The neurobiological effects of virtual reality on neuronal plasticity have been shown to result in increased cortical gray matter volumes, higher concentration of electroencephalographic beta-waves, and enhanced cognitive performance. Clinical application (...) of virtual reality is aided by innovative brain-computer interfaces, which allow direct tapping into the electric activity generated by different brain cortical areas for precise voluntary control of connected robotic devices. Virtual reality is also valuable to healthy individuals as a narrative medium for redesigning their individual stories in an integrative process of self-improvement and personal development. Future upgrades of virtual reality-based technologies promise to help humans transcend the limitations of their biological bodies and augment their capacity to mold physical reality to better meet the needs of a globalized world. (shrink)

This paper argues that severe and ongoing trauma (SOT) can lead to impairment at the level of the minimal self (MS), which is the core element in the structure of subjectivity. In the long-term, such impairments can result in complex post-traumatic stress disorder (CPTSD) and schizophrenia. The paper tackles this issue while trying to create meaningful bridges between phenomenology and neuroscience.

Uncovering the neural basis of consciousness is a major challenge to neuroscience. In this Perspective, Tononi and colleagues describe the integrated information theory of consciousness and how it might be used to answer outstanding questions about the nature of consciousness.

When does a human being cease to exist? For millennia, the answer to this question had remained largely unchanged: death had been diagnosed when heartbeat and breathing were permanently absent. Only comparatively recently, in the 1950s, rapid developments in intensive-care medicine called into question this widely accepted criterion. What had previously been deemed a permanent cessation of vital functions suddenly became reversible. -/- A new criterion of death was needed. It was suggested that the destruction of the brain could indicate (...) the death of the organism in the presence of external life support. Soon the so-called brain death became the new worldwide standard. In recent years, however, doubts about this neurological criterion have been growing. Is brain death really our death? -/- This is the question that this thesis seeks to answer. To this end, we shall connect the medical debate about the definition of death to the philosophical debate about personal identity. While we will find that the destruction of its brain does in fact not correspond to an organism’s death, we shall also ask whether the assumption that we are essentially organisms is correct. May brain death be the ceasing to exist of a different entity? -/- Substituting clinical case reports and considerations about human physiology for the use of thought experiments, the thesis takes a novel and philosophically unconventional approach to the problem of what we essentially are. We shall analyse various pathological conditions and their respective effects on the bodily and mental characteristics of our existence. We will conclude that brain death is indeed our death – but for reasons entirely different from those cited in the original justification of this criterion. (shrink)

Most discussions of near-death experiences (NDEs) in both the academic and popular literature contend that they establish ('prove') supernaturalism (about NDEs): they show that the mind is not the brain (and can continue after the brain stops functioning), and they bring us into contact with non-physical realms. I believe that the evidence provided by NDEs for supernaturalism is not persuasive, but I offer an alternative, naturalistic interpretation of these phenomena. On this interpretation, NDEs are 'real' in both senses of the (...) term: they really occur (people really have them, with the experiential content ascribed to them), and they are accurate. On this interpretation, NDEs are fundamentally about a journey from the known to the unknown, guided by a trusted mentor. Thus, NDEs accurately depict the possibilities for dying. Negative NDEs indicate the possibility of dying in cold, sterile, lonely circumstances, whereas positive NDEs point to the possibility of 'dying well', surrounded by loved ones. This is an interpretation that avoids the problems for supernaturalism of the gap between evidence and conclusion, and the commitment to causal interaction between physical and non-physical realms. (shrink)

The brain is composed of electrically excitable neuronal networks regulated by the activity of voltage-gated ion channels. Further portraying the molecular composition of the brain, however, will not reveal anything remotely reminiscent of a feeling, a sensation or a conscious experience. In classical physics, addressing the mind–brain problem is a formidable task because no physical mechanism is able to explain how the brain generates the unobservable, inner psychological world of conscious experiences and how in turn those conscious experiences steer the (...) underlying brain processes toward desired behavior. Yet, this setback does not establish that consciousness is non-physical. Modern quantum physics affirms the interplay between two types of physical entities in Hilbert space: unobservable quantum states, which are vectors describing what exists in the physical world, and quantum observables, which are operators describing what can be observed in quantum measurements. Quantum no-go theorems further provide a framework for studying quantum brain dynamics, which has to be governed by a physically admissible Hamiltonian. Comprising consciousness of unobservable quantum information integrated in quantum brain states explains the origin of the inner privacy of conscious experiences and revisits the dynamic timescale of conscious processes to picosecond conformational transitions of neural biomolecules. The observable brain is then an objective construction created from classical bits of information, which are bound by Holevo’s theorem, and obtained through the measurement of quantum brain observables. Thus, quantum information theory clarifies the distinction between the unobservable mind and the observable brain, and supports a solid physical foundation for consciousness research. (shrink)

This work deals with the particular nature of consciousness in comparison to matter, as well as with the question of how conscious subjective experience can be possible at all. Based on a step-by-step derivation, a new approach is introduced and a theory for a possible explanation is proposed, named C-Pattern Theory. The statements and implications resulting from C-Pattern Theory reveal new perspectives on elementary aspects of reality and open up new possibilities with regard to fundamental questions.

The sense of agency is typically defined as the experience of controlling one’s own actions, and through them, changes in the external environment. It is often assumed that this experience is a single, unified construct that can be experimentally manipulated and measured in a variety of ways. In this article, we challenge this assumption. We argue that we should acknowledge four possible agency-related psychological constructs. Having a clear grasp of the possible constructs is important since experimental procedures are only able (...) to target some but not all the possible constructs. The unacknowledged misalignment of the possible constructs of a sense of agency and the experimental procedures is a major theoretical and methodological obstacle to studying the sense of agency. Only if we recognize the nature of this obstacle will we be able to design the experimental paradigms that would enable us to study the responsible computational mechanisms. (shrink)

ABSTRACT LeDoux's pioneering work on the neurobiology of fear has played a crucial role in informing debates in the philosophy of emotion. For example, it plays a key part in Griffiths’ argument for why emotions don’t form a natural kind. Likewise, it is employed by Faucher and Tappolet to defend pro-emotion views, which claim that emotions aid reasoning. LeDoux, however, now argues that his work has been misread. He argues that using emotion terms, like ‘fear’, to describe neurocognitive data adds (...) a ‘surplus meaning’: it attributes phenomenal properties to survival circuits which they don’t possess. This paper aims to explore LeDoux's new proposal, and examine the potentially devastating consequences that ensue for the aforementioned views. I end by addressing the worry that these lessons are conditional on LeDoux's own higher-order theory of emotional consciousness being true. (shrink)

The brain is composed of electrically excitable neuronal networks regulated by the activity of voltage-gated ion channels. Further portraying the molecular composition of the brain, however, will not reveal anything remotely reminiscent of a feeling, a sensation or a conscious experience. In classical physics, addressing the mind-brain problem is a formidable task because no physical mechanism is able to explain how the brain generates the unobservable, inner psychological world of conscious experiences and how in turn those conscious experiences steer the (...) underlying brain processes toward desired behavior. Yet, this setback does not establish that consciousness is non-physical. Modern quantum physics affirms the interplay between two types of physical entities in Hilbert space: unobservable quantum states, which are vectors describing what exists in the physical world, and quantum observables, which are operators describing what can be observed in quantum measurements. Quantum no-go theorems further provide a framework for studying quantum brain dynamics, which has to be governed by a physically admissible Hamiltonian. Comprising consciousness of unobservable quantum information integrated in quantum brain states explains the origin of the inner privacy of conscious experiences and revisits the dynamic timescale of conscious processes to picosecond conformational transitions of neural biomolecules. The observable brain is then an objective construction created from classical bits of information, which are bound by Holevo's theorem, and obtained through the measurement of quantum brain observables. Thus, quantum information theory clarifies the distinction between the unobservable mind and the observable brain, and supports a solid physical foundation for consciousness research. (shrink)

This paper argues that self-consciousness and associated psychic consciousness emerges as a consequence of a recursive selfdirecting on itself of the cognitive centre in the human brain. The neural mechanisms and circuits underlying self-consciousness appeared and developed during biological evolution as an adaptation that increased the fitness of our social ancestors, chances of their survival, and reproduction. These mechanisms/circuits strengthened the efficiency of individuals in various social relations, enabled separation of 'I' from 'he/she' or 'them' and the formation of firstand (...) higher-order theory of mind, stimulated development of complex, recursive language, facilitated forming temporary coalitions directed to achieve a particular goal, helped to establish social hierarchies, and increased coherence and cooperativity of a social group. The reciprocal reinforcement of the development of the neural network in the brain underlying self-consciousness and of the network of various social relations and aspects was a self-driving process, one of positive feedbacks abundant in anthropogenesis. (shrink)

'Thick neural event' is introduced to mean an event that requires firings of more than one neuron and a substantive (i.e. additional to merely temporal and spatial) relation among them. It is shown that some well regarded theories (e.g. by Lamme, Koch, etc.) strongly suggest that neural correlates of consciousness (NCCs) are thick neural events. It is then shown that thin (= not thick) neural events provide sufficient causation for neural events leading to behaviour, and that there are good reasons (...) to reject overdetermination by thick events. Thus, any physicalism that recognizes legitimacy of a search for NCCs must either reject theories that embrace thickness of NCCs, or accept the epiphenomenalistic view that the properties in virtue of which we are conscious are not properties in virtue of which events causally contribute to our behaviour. (shrink)

The first decade of event-related potential (ERP) research had established that the most consistent correlates of the onset of visual consciousness are the early visual awareness negativity (VAN), a posterior negative component in the N2 time range, and the late positivity (LP), an anterior positive component in the P3 time range. Two earlier extensive reviews ten years ago had concluded that VAN is the earliest and most reliable correlate of visual phenomenal consciousness, whereas LP probably reflects later processes associated with (...) reflective/access consciousness. This article provides an update to those earlier reviews. ERP and MEG studies that have appeared since 2010 and directly compared ERPs between aware and unaware conditions are reviewed, and important new developments in the field are discussed. The result corroborates VAN as the earliest and most consistent signature of visual phenomenal consciousness, and casts further doubt on LP as an ERP correlate of phenomenal consciousness. (shrink)

According to an increasing number of reports, nonchemical, distant cellular interactions may be responsible for a yet underestimated mechanism of cell-to-cell communication and coordinated cellular responses. Based on these and other experiments, an electromagnetic nature of consciousness has been proposed field theory). In the present study, we provide supporting evidence for this theory by applying a novel bioelectric biosensor in order to simultaneously investigate changes of the membrane potential of physically separated human SK-N-SH neuroblastoma cells. We demonstrate the existence of (...) distant communication between neuroblastoma cells. When one of the isolated groups of cells was stimulated with the neurotransmitter dopamine, a synchronized response was observed in the neighbouring but physically separated cell group. The range of this phenomenon was decreased with increasing distance. In the absence of a dopamine-induced stimulus, no clear recognizable pattern of synchronized response was observed. The nature of mechanisms underlying the observed distant cellular interactions is discussed in view of the observed coordinated patterns of changes of the cell membrane potential. (shrink)

Hallucinations refer to a wide range of subjective human experiences. As a consequence, hallucinations constitute fascinating phenomena for the dialogue between phenomenology and neuroscience. We propose a summary of the possible strategies of this dialogue encompassing neurophenomenology or front-loaded phenomenology. We question the issue of the continuity of hallucinatory experiences, at both the subjective and objective levels. We also question the possible links between hallucinations and self-disorders, and discuss how these connections may add value to the understanding of hallucinations at (...) both levels of interest. As only a very limited amount of experimental work has specifically focused on hallucinations based on this dialogue between phenomenology and brain imaging, we conclude by describing potential starting points for future studies. (shrink)

One of the most remarkable ongoing stories in the history of neuroscience is the nearly universal neglect of what is arguably the most strategically located structure in the central nervous system -- an enigmatic, thread-like aggregation of glycoproteins originating from the centre of the brain called Reissner's fibre. It is an anomaly, which, because it lies beyond the grasp of conventional theoretical and technological tools, has been rendered virtually invisible to neuroscientists. New tools, however, are poised to reveal the secrets (...) of this unique, highly conserved structure which runs through the entire length of the fluid-filled cavities and passageways of the CNS. (shrink)

In this paper we discuss the two-system framework, examine its strengths, point out a fundamental weakness concerning the unity of conscious experience, and then propose a new hypothesis that avoids that weakness and other related concerns. According to our strong emergence hypothesis, what emerges are not merely mental properties in specialized, distributed neural areas, but also a new, irreducibly singular entity that functions in a recurrent manner to integrate its mental properties and to rewire its brain. We argue that the (...) former function is suggested, in part, by the effects of anesthetics on sensory integration, and that the latter function is suggested by evidence garnered from the neuroscience of mindfulness, constraint-induced movement therapy for stroke, and neuroimaging data surrounding mental illness. We then discuss how our strong emergence hypothesis relates to the description and treatment of neuropsychiatric disorders. Finally, potential objections are addressed. (shrink)

Consciousness is arguably the greatest mystery in science, still being unsolved after millennia of thinking. This book is one further attempt at trying to bring new insights regarding consciousness. While certainly the mystery will continue, the ideas in this book will raise awareness regarding an aspect of the phenomenology of consciousness that has been overlooked by past thinkers, and that is the emergent structure of consciousness, which in the end will be shown to be realized by the nature of self-reference (...) of looking-back-at-itself. The great take-away from appreciating the true nature of self-refence would be the need to switch to an unformal way of thinking in doing science if the problem of consciousness is to be resolved. To unformal way of thinking means abandoning the desire to have clearly defined entities in our theories, like “energy” or “space-time” or “spin”, and instead allow for entities that cannot be formalized, to be responsible for the workings of the world. We will slowly see as the book unfolds why the need for unformal way of thinking arises. -/- Regarding the presentation style, the book is both a popular book and a rigorous presentation that goes into thorough phenomenological analyses of consciousness. The reason is that our lives themselves are both familiar and the very nature of existence. As opposed to other writings that use a more technical approach, the philosophy of this book is that a theory of consciousness should focus more on the most mundane manifestations of consciousness, like the redness of an apple or the warmish feeling of cup of hot chocolate, in order to give a clearer understanding of consciousness. Therefore, the book is full of everyday examples of conscious experiences that the reader can relate to and use them to gain deeper insights into the workings of consciousness. In the same way that LHC is the laboratory of physicists, introspection is our own laboratory, the advantage of introspection over LHC being that it is accessible to anyone. Every person can gain a deep knowledge of consciousness by simply paying close attention to his own experiences. Of course, the difficulty arises because of the huge diversity of our experiences and this might raise an apparent initial obstacle of where one is to begin his understanding of consciousness. The book is designed as a guide through the complexities of everyday experiences in the direction of sorting them out in general and clear ways of thinking, showing that consciousness needs not be something that difficult to understand if only the proper attention is given to our experiences. -/- Therefore, the book starts with a chapter about qualia, where through many examples it is shown to be a form of meaning. Then the reader is familiarized with the Self through simple thought experiments that lead to the conclusion of the unicity of the Self, and then a further logical analysis that shows the eternal existence of the Self. After these initial familiarizations with consciousness, the book goes into its core subject, that being the emergent phenomenology, in which it will be shown how consciousness is structured on a holarchy of levels and how ultimately this structuring is a result of self-reference looking-back-at-itself, consciousness being shown to be possible only because of the unformalizable nature of self-reference. (shrink)

This paper is aiming to investigate the physical substrate of conscious process. It will attempt to find out: How does conscious process establish relations between their external stimuli and internal stimuli in order to create reality? How does consciousness devoid of new sensory input result to its new quantum effects? And how does conscious process gain mass in brain? This paper will also try to locate the origins of consciousness at the level of neurons along with the quantum effects of (...) conscious process. (shrink)

As for most measurement procedures in the course of their development, measures of consciousness face the problem of coordination, i.e., the problem of knowing whether a measurement procedure actually measures what it is intended to measure. I focus on the case of the Perceptual Awareness Scale to illustrate how ignoring this problem leads to ambiguous interpretations of subjective reports in consciousness science. In turn, I show that empirical results based on this measurement procedure might be systematically misinterpreted.

The scientific study of consciousness emerged as an organized field of research only a few decades ago. As empirical results have begun to enhance our understanding of consciousness, it is important to find out whether other factors, such as funding for consciousness research and status of consciousness scientists, provide a suitable environment for the field to grow and develop sustainably. We conducted an online survey on people’s views regarding various aspects of the scientific study of consciousness as a field of (...) research. 249 participants completed the survey, among which 80% were in academia, and around 40% were experts in consciousness research. Topics covered include the progress made by the field, funding for consciousness research, job opportunities for consciousness researchers, and the scientific rigor of the work done by researchers in the field. The majority of respondents (78%) indicated that scientific research on consciousness has been making progress. However, most participants perceived obtaining funding and getting a job in the field of consciousness research as more difficult than in other subfields of neuroscience. Overall, work done in consciousness research was perceived to be less rigorous than other neuroscience subfields, but this perceived lack of rigor was not related to the perceived difficulty in finding jobs and obtaining funding. Lastly, we found that, overall, the global workspace theory was perceived to be the most promising (around 28%), while most non-expert researchers (around 22% of non-experts) found the integrated information theory (IIT) most promising. We believe the survey results provide an interesting picture of current opinions from scientists and researchers about the progresses made and the challenges faced by consciousness research as an independent field. They will inspire collective reflection on the future directions regarding funding and job opportunities for the field. (shrink)

Consciousness and Physicalism: A Defense of a Research Program explores the nature of consciousness and its place in the world, offering a revisionist account of what it means to say that consciousness is nothing over and above the physical. By synthesizing work in the philosophy of mind, metaphysics, and philosophy of science from the last twenty years and forging a dialogue with contemporary research in the empirical sciences of the mind, Andreas Elpidorou and Guy Dove advance and defend a novel (...) formulation of physicalism. Although physicalism has been traditionally understood to be a metaphysical thesis, Elpidorou and Dove argue that there is an alternative and indeed preferable understanding of physicalism that both renders physicalism a scientifically informed explanatory project and allows us to make important progress in addressing the ontological problem of consciousness. Physicalism, Elpidorou and Dove hold, is best viewed not as a thesis (metaphysical or otherwise) but as an interdisciplinary research program that aims to compositionally explain all natural phenomena that are central to our understanding of our place in nature. Consciousness and Physicalism is replete with philosophical arguments and informed, through and through, by findings in many areas of scientific research. It advances the debate regarding the ontological status of consciousness. It will interest students and scholars in philosophy of mind, metaphysics, philosophy of cognitive science, and philosophy of science. And it will challenge both foes and friends of physicalism. -/- . (shrink)

Given the hard problem of consciousness (Chalmers, 1995) there are no brain electrophysiological correlates of the subjective experience (the felt quality of redness or the redness of red, the experience of dark and light, the quality of depth in a visual field, the sound of a clarinet, the smell of mothball, bodily sensations from pains to orgasms, mental images that are conjured up internally, the felt quality of emotion, the experience of a stream of conscious thought or the phenomenology of (...) thought). However, there are brain occipital and left temporal electrophysiological correlates of the subjective experience (Pereira, 2015). Notwithstanding, as evoked signal, the change in event-related brain potentials phase (frequency is the change in phase over time) is instantaneous, that is, the frequency will transiently be infinite: a transient peak in frequency (positive or negative), if any, is instantaneous in electroencephalogram averaging or filtering that the event-related brain potentials required and the underlying structure of the event-related brain potentials in the frequency domain cannot be accounted, for example, by the Wavelet Transform (WT) or the Fast Fourier Transform (FFT) analysis, because they require that frequency is derived by convolution rather than by differentiation. However, as I show in the current original research report, one suitable method for analyse the instantaneous change in event-related brain potentials phase and accounted for a transient peak in frequency (positive or negative), if any, in the underlying structure of the event-related brain potentials is the Empirical Mode Decomposition with post processing (Xie et al., 2014) Ensemble Empirical Mode Decomposition (postEEMD) and Hilbert-Huang Transform (HHT). (shrink)

A strong and growing intuition in society today is the idea that our thoughts create our own reality. Yet it seems obvious that, try as we might, our lives are not quite what we fantasize. Is the intuition thus wrong? Through a rational, methodic interpretation of meditative insights, the validity of which is substantiated with a compelling scientific literature review, the author constructs hypotheses that reconcile facts with intuition. Mesmerizing narratives of his expeditions into the unconscious suggest an amazing possibility: (...) just as dreams are seemingly autonomous manifestations of our psyche, reality may be an externalized combination of the subconscious dreams of us all, mixed as they are projected onto the fabric of space-time. Perhaps the laws of physics are an emergent by-product of such synchronization of thoughts. Through computer simulations, the author explores the implications of these hypotheses, with conclusions uncannily reminiscent of observed phenomena. (shrink)

The goal of this short chapter, aimed at philosophers, is to provide an overview and brief explanation of some central concepts involved in predictive processing (PP). Even those who consider themselves experts on the topic may find it helpful to see how the central terms are used in this collection. To keep things simple, we will first informally define a set of features important to predictive processing, supplemented by some short explanations and an alphabetic glossary. -/- The features described here (...) are not shared in all PP accounts. Some may not be necessary for an individual model; others may be contested. Indeed, not even all authors of this collection will accept all of them. To make this transparent, we have encouraged contributors to indicate briefly which of the features are necessary to support the arguments they provide, and which (if any) are incompatible with their account. For the sake of clarity, we provide the complete list here, very roughly ordered by how central we take them to be for “Vanilla PP” (i.e., a formulation of predictive processing that will probably be accepted by most researchers working on this topic). More detailed explanations will be given below. Note that these features do not specify individually necessary and jointly sufficient conditions for the application of the concept of “predictive processing”. All we currently have is a semantic cluster, with perhaps some overlapping sets of jointly sufficient criteria. The framework is still developing, and it is difficult, maybe impossible, to provide theory-neutral explanations of all PP ideas without already introducing strong background assumptions. (shrink)