Almost everyone who has a limb amputated will experience a phantom limb--the vivid impression that the limb is not only still present, but in some cases, painful. There is now a wealth of empirical evidence demonstrating changes in cortical topography in primates following deafferentation or amputation, and this review will attempt to relate these in a systematic way to the clinical phenomenology of phantom limbs. With the advent of non-invasive imaging techniques such as MEG (magnetoencephalogram) and functional MRI, topographical reorganization (...) can also be demonstrated in humans, so that it is now possible to track perceptual changes and changes in cortical topography in individual patients. We suggest, therefore, that these patients provide a valuable opportunity not only for exploring neural plasticity in the adult human brain but also for understanding the relationship between the activity of sensory neurons and conscious experience. We conclude with a theory of phantom limbs, some striking demonstrations of phantoms induced in normal subjects, and some remarks about the relevance of these phenomena to the question of how the brain constructs a 'body image.'. (shrink)

This introductory chapter attempts to clarify the philosophical, empirical, and theoretical bases on which a cognitive neuroscience approach to consciousness can be founded. We isolate three major empirical observations that any theory of consciousness should incorporate, namely (1) a considerable amount of processing is possible without consciousness, (2) attention is a prerequisite of consciousness, and (3) consciousness is required for some specific cognitive tasks, including those that require durable information maintenance, novel combinations of operations, or the spontaneous generation of intentional (...) behavior. We then propose a theoretical framework that synthesizes those facts: the hypothesis of a global neuronal workspace. This framework postulates that, at any given time, many modular cerebral networks are active in parallel and process information in an unconscious manner. An information becomes conscious, however, if the neural population that represents it is mobilized by top-down attentional amplification into a brain-scale state of coherent activity that involves many neurons distributed throughout the brain. The long-distance connectivity of these `workspace neurons' can, when they are active for a minimal duration, make the information available to a variety of processes including perceptual categorization, long-term memorization, evaluation, and intentional action. We postulate that this global availability of information through the workspace is what we subjectively experience as a conscious state. A complete theory of consciousness should explain why some cognitive and cerebral representations can be permanently or temporarily inaccessible to consciousness, what is the range of possible conscious contents, how they map onto specific cerebral circuits, and whether a generic neuronal mechanism underlies all of them. We confront the workspace model with those issues and identify novel experimental predictions. Neurophysiological, anatomical, and brain-imaging data strongly argue for a major role of prefrontal cortex, anterior cingulate, and the areas that connect to them, in creating the postulated brain-scale workspace. (shrink)

This is a book about how we see: the environment around us (its surfaces, their layout, and their colors and textures); where we are in the environment; whether or not we are moving and, if we are, where we are going; what things are good for; how to do things (to thread a needle or drive an automobile); or why things look as they do.The basic assumption is that vision depends on the eye which is connected to the brain. The (...) author suggests that natural vision depends on the eyes in the head on a body supported by the ground, the brain being only the central organ of a complete visual system. When no constraints are put on the visual system, people look around, walk up to something interesting and move around it so as to see it from all sides, and go from one vista to another. That is natural vision—and what this book is about. (shrink)

Gallagher, S. 2003. Bodily self-awareness and object perception. _Theoria et Historia Scientiarum: International Journal for Interdisciplinary_ _Studies_, 7 (1) - in press.

Hilary Putnam deals in this book with some of the most fundamental persistent problems in philosophy: the nature of truth, knowledge and rationality. His aim is to break down the fixed categories of thought which have always appeared to define and constrain the permissible solutions to these problems.

Edition de 150 pages manuscrites laissées par Merleau-Ponty à sa mort et devant constituer les premiers chapitres d'un grand ouvrage intitulé "Le visible et l'invisible". Elles devaient introduire à un nouveau départ pour la pensée philosophique, les concepts fondamentaux de la philosophie moderne étant considérés comme des postulats résultant eux-mêmes déjà d'une interprétation singulière du monde. Le dernier tiers du volume rassemble des notes de travail, éparses, rédigées en vue de l'oeuvre, et qui peuvent en éclairer le sens. Une substantielle (...) postface de Claude Lefort cherche à dégager le sens qu'aurait eu "Le visible et l'invisible" dans le parcours, interrompu. (shrink)

Arien Mack and Irvin Rock make the radical claim that there is no conscious perception of the visual world without attention to it.

Aron Gurwitsch (1901-1973) est surtout connu du public fancophone par son ouvrage de 1957: Theorie du champ de la conscience. C'est la periode parisienne (de l'automne 1933 au printemps 1940) de Gurwitsch que le present volume documente tres precisement: il presente d'abord pour la premiere fois, les resultats substantiels d'un ouvrage en gestation qui n'aura pas vu le jour du vivant de l'auteur et qui rassemble, sous le titre Esquisse de la phenomenologie constitutive, les materiaux des cours et conferences sur (...) la Gestaltpsychologie, la psychologie intentionaliste, la phenomenologie de l'ideation, l'introduction a la phenomenologie. Le present volume rassemble aussi, a titre d'Appendice, quelques uns des articles publies par Aron Gurwitsch lors de cette periode parisienne. L'ensemble de ces travaux constitue un temoignage inedit sur une des toutes premieres introductions a la phenomenologie husserlienne, dans son veritable contexte de probleme. (shrink)

We are even less aware of our internal organs and the physiological processes that keep us alive. In this fascinating work, Drew Leder examines all the ways in which the body is absent—forgotten, alien, uncontrollable, obscured.

Table of Contents Acknowledgments 1 Self-Consciousness and the Body: An Interdisciplinary Introduction by Naomi Eiland, Anthony Marcel and José Luis Bermúdez 2 The Body Image and Self-Consciousness by John Campbell 3 Infants’ Understanding of People and Things: From Body Imitation to Folk Psychology by Andrew N. Meltzoff and M. Keith Moore 4 Persons, Animals, and Bodies by Paul F. Snowdon 5 An Ecological Perspective on the Origins of Self by George Butterworth 6 Objectivity, Causality, and Agency by Thomas Baldwin 7 (...) At Two with Nature: Agency and the Development of Self-World Dualism by James Russell 8 Ecological Perception and the Notion of a Nonconceptual Point of View by José Luis Bermúdez 9 Proprioception and the Body Image by Brian O’Shaughnessy 10 Awareness of One’s Own Body: An Attentional Theory of Its Nature, Development, and Brain Basis by Marcel Kinsbourne 11 Body Schema and Intentionality by Shaun Gallagher 12 Living without Touch and Peripheral Information about Body Position and Movement: Studies with Deafferented Subjects by Jonathan Cole and Jacques Paillard 13 Bodily Awareness: A Sense of Ownership by M. G. F. Martin 14 Bodily Awareness and the Self by Bill Brewer 15 Introspection and Bodily Self-Ascription by Quassim Cassam 16 Consciousness and the Self by Naomi Eilan Contributors Index. (shrink)