I problematize the notion of self-legislation. I follow in Elizabeth Anscombe’s footsteps and suggest that on a plausible reading of Kant, he does not so much misidentify the sources of moral normativity, as fail to identify any such sources in the first place: The set of terms with which the Kantian is attempting to do so is confused. Interpreters today take Kant’s legal language to be merely metaphorical. The language of ‘self-legislation,’ in particular, is replaced by such interpreters with a (...) language of ‘self-constitution.’ I challenge that, and claim that the language of legislation and judgment was, for Kant, more than a metaphor: The recognition of the moral law, he says, motivates us as if it were “the bidding of another person.” Legislation is typically remote in this way. It typically requires a distance between lawgiver and law-receiver—a distance that allows, for instance, for self-inspection and judgment. For Kant, these are the terms in which to explain the forms of the moral judgment and the sources of moral normativity. It is questionable, however, whether we can be remote from our own actions in the way required—whether we can observe our own actions. We cannot, for example, raise our hand and wonder how far it will go up. I develop this claim into an Anscombean challenge to Kant, and I call upon Kantians to take it seriously. (shrink)

The classic follow-up to the bestselling "The Crack in the Cosmic Egg " - Explains the process of acculturation and the mechanisms that create our self-limiting "cosmic egg" of consensus reality - Reveals how our biological development innately creates a "crack" in our cosmic egg--leaving a way to return to the unencumbered consciousness of childhood - Explores ways to discover and explore the "crack" to restore wholeness to our minds and reestablish our ability to create our own realities In (...) this classic follow-up to his bestselling "The Crack in the Cosmic Egg," Joseph Chilton Pearce explains the process of acculturation and the mechanisms that create our self-limiting "cosmic egg" of consensus reality. Laying the groundwork for his later classic "Magical Child," Pearce shows that we go through early childhood connecting with the world through our senses. With the development of language and the process of acculturation not only do our direct experiences of the world become much less vivid but our innate states of nonordinary consciousness become suppressed. Trapped in a specific cultural context--a "cosmic egg"--we are no longer able to have or even recognize mystical experiences not mediated by the limitations of our culture. Motivated primarily by a fear of death, our enculturation literally splits our minds and prevents us from living fully in the present. Drawing from Carlos Castaneda's writings about Don Juan and the sense of "body-knowing," Pearce explores the varieties of nonordinary consciousness that can help us return to the unencumbered consciousness of our infancy. He shows that just as we each create our own cosmic egg of reality through cultural conditioning, we also innately create a "crack" in that egg. Ultimately certain shifts in our biological development take place to offset acculturation, leaving an avenue of return to our primary state. Pearce examines the creation of the "egg" itself and ways to discover its inherent cracks to restore wholeness to our minds, release us from our fear of death, and reestablish our ability to create our own realities through imagination and biological transcendence. (shrink)

Elizabeth Schechter explores the implications of the experience of people who have had the pathway between the two hemispheres of their brain severed, and argues that there are in fact two minds, subjects of experience, and intentional agents inside each split-brain human being: right and left. But each split-brain subject is still one of us.

Many experimental findings with split-brain subjects intuitively suggest that each such subject has two minds. The conceptual and empirical basis of this duality intuition has never been fully articulated. This article fills that gap, by offering a reconstruction of early neuropsychological literature on the split-brain phenomenon. According to that work, the hemispheres operate independently of each other insofar as they interact via the mediation of effection and transduction—via behavior and sensation, essentially. This is how your mind and (...) my mind interact with each other, however, giving rise to the intuition that a split-brain subject has two minds. (shrink)

This paper challenges the widely held theory that split-brain patients have ‘two-minds’ and can thus be described as being two distinct persons. A distinction is made between the singularity of mind and the coherence of mind. It is stressed that ‘a single mind’ is not something posited to explain coherence among mental contents, but is merely a mark that such coherence holds to a certain degree. However, there is no sharp dividing line regarding what counts as a single (...) mind. It is argued that mental coherence is always a matter of degree, and that our concept of a single mind can accomodate spit-brain phenomena. (shrink)

Split brains that result in two simultaneous streams of consciousness cut off from each other are wrongly held to be grounds for doubting the existence of the divinely created soul. The mistake is based on two related errors: first, a failure to appreciate the soul's dependence upon neurological functioning; second, a fallacious belief that if the soul is simple, i.e. without parts, then there must be a unity to its thought, all of its thoughts being potentially accessible to reflection (...) or even unreflective causal interactions. But a soul theorist can allow neurological events to keep some conscious thoughts unavailable to others. (shrink)

Some philosophers have argued that so long as two neural events, within a subject, are both of the same type and both carry the same content, then these events may jointly constitute a single mental token, regardless of the sort of causal relation to each other that they bear. These philosophers have used this claim—which I call the “singularity-through-redundancy” position—in order to argue that a split-brain subject normally has a single stream of consciousness, disjunctively realized across the two hemispheres. (...) This paper argues, against this position, that the kind of causal relations multiple neural events bear to each other constrains the mental tokens with which functionalists who are realists can identify them. (shrink)

Brain bisection raises the intriguing question about how many minds the split-brain patients have. Thomas Nagel and Derek Parfit, who have brought this question into consideration, come to similar conclusions in response to it. They both argue that the question has no answer, that there simply isn’t any countable number of minds that the split-brain patients have. In addition, Parfit argues that the split-brain cases can be adequately described only if we adopt a certain particular (...) view about the metaphysical nature of a person. The goal of this paper is to clarify both of those views and, in particular, to explain why Parfit’s preference for one model of personhood does not determine how many persons survive brain bisection. (shrink)

After the first callosotomy surgeries were performed, the general consensus among the medical community was that severing the corpus callosum had relatively little, if any, effect on an individual's behavior. Nearly twenty years later, researchers discovered that, under experimental conditions, the two hemispheres could simultaneously maintain very different interpretations of the same stimulus. These findings immediately called into question the unity of subjective experience, a fundamental characteristic of human consciousness. How could the split‐brain patient not experience any disruption in (...) his experience as a unified self when the two hemispheres are physically and functionally disconnected? In this chapter, we review the research that has led to a conceptualization of the split brain as two minds within one body and the implications of this research for the scientific study of consciousness. We argue that consciousness is a neural function that emerges from the integration of information across available functional modules. (shrink)

In this paper I argue that split-brain syndrome is best understood within an extended mind framework and, therefore, that its very existence provides support for an externalist account of conscious perception. I begin by outlining the experimental aberration model of split-brain syndrome and explain both: why this model provides the best account of split-brain syndrome; and, why it is commonly rejected. Then, I summarise Susan Hurley’s argument that split-brain subjects could unify their conscious perceptual field by (...) using external factors to stand-in for the missing corpus callosum. I next provide an argument that split-brain subjects do unify their perceptual fields via external factors. Finally, I explain why my account provides one with an experimental aberration model which avoids the problems typically levelled at such views, and highlight some empirical predictions made by the account. The nature of split-brain syndrome has long been considered mysterious by proponents of internalist accounts of consciousness. However, in this paper I argue that externalist theories can provide a straightforward explanation of the condition. I therefore conclude that the ability of externalist accounts to explain split-brain syndrome gives us strong reason to prefer them over internalist rivals. (shrink)

It is argued that a radical relocation of subjectivity began several thousand years ago. A subjectivity experienced in the centric region of the heart, and in the body as a whole, began to be avoided in favor of the eccentric head as a new location of subjectivity. In ancient literature, for example in Homer's epics, the heart and various other bodily organs were described as centers of subjectivity and organs of perception for spiritual experience and communion with others and the (...) world. Mind and body were integrated. Bur also in the early historical record, as in the Old Testament, the heart and body were increasingly described as rebellious and rejected as impure. Head and heart, mind and body, became estranged. The body was judged an unsuitable, impure vessel for spiritual experience. This change in the location of subjectivity presaged the later development of Platonic, Gnostic, Christian, and Cartesian distinctions favoring mind over and against the body. It may also have contributed to some of the characteristic psychological and pathological processes (e.g., psychosomatic illnesses, repression, narcissism) currently attributed to the psychology of the modern Western, and specifically, North American self. (shrink)

One of the main problems of the soul theory is how the soul, which has no material properties, interacts with body. Because it is difficult to understand how an immaterial being interacts with matter. In particular, as our scientific understanding of the way the brain works and how it affects our psychology expands, the question of whether a soul is needed for the mind manifests itself more strongly. In this context, current data on the close connection between the brain and (...) the mind is often used as an objection to the understanding of the soul. One of the recent data that has been claimed to have dealt a heavy blow against the understanding of the soul is the split-brain case. The split-brain case is the name given to the condition of patients whose brain hemispheres are surgically separated from each other. The difference of this case from other cases used against dualism is that it pointed out that the integrity of consciousness also depends on the brain. Because although there was a connection between many mental functions and the brain before, it was not between the unity of consciousness. For it was a new claim that the unity of consciousness also depends on the brain. On the contrary, arguments were used in favor of the existence of the soul, stating that the brain cannot provide the unity of consciousness due to its multi-part structure, and therefore an indivisible soul is necessary. Whereas, in the split-brain case, patients whose brain hemispheres were separated from each other could think and act like two different people. This is interpreted as contrary to the soul view, which argues that the individual and the soul are indivisible. The present study considers whether the split-brain case does indeed offer a strong argument against dualism. In this paper, first of all, more detailed information about the split-brain case will be given. Then, the arguments of those who use this case against dualism and why the issue seems problematic in terms of the soul view will be discussed. Afterwards, some solutions offered by dualists to this problem will be evaluated. There are three different strategies that dualists follow at this point. The first one rejects the idea that consciousness is divided as a result of the split-brain phenomenon, the second rejects the idea that the soul is indivisible, and the third way accepts both, but argues that they are not contradictory, because a single soul can have a divided consciousness. This paper argues that even if it is accepted that more than one stream of consciousness emerges as a result of the split-brain case, this cannot be seen as a finishing blow to dualism. Despite this, the case in question can be regarded as a strong argument against dualism. For a counter-argument to be strong, it does not need to conclusively demonstrate the falsity of what it opposes. It suffices to show the weakness of its probability of being true. In this respect, the split-brain case greatly weakens the probability of dualism being true. (shrink)

In "Consciousness Explained," Dennett (1991) denies that split-brain humans have double consciousness: he describes the experiments as "anecdotal." In attempting to replace the Cartesian Theatre of the Mind" with his own "Multiple Drafts" view of consciousness, Dennett rejects the notion of the mind as a countable thing in favour of its being a mere "abstraction." His criticisms of the standard interpretation of the split-brain data are analyzed here and each is found to be open to objections. There exist (...) people who have survived left ["dominant"] cerebral hemispherectomy; by Dennett's criteria, they would not have minds. (shrink)

. Cognitive science challenges our understandings of self and freedom. In this article, adapted from a chapter in Minding God: Theology and the Cognitive Sciences , I review some of the scientific literature with regard to issues of self and freedom. I argue that our sense of self is a construct and heavily dependent on the kind of brain that we have. Furthermore, understanding the issue of freedom requires an understanding of the findings of cognitive science. Human beings are constrained (...) to be free; our biology in no small way determines the kinds of freedom that we are able to have. (shrink)

Contrary to received opinion among philosophers, psychologists, and neuroscientists, conscious duality as a principle of brain organization is neither incoherent nor demonstrably false. The present paper begins by reviewing the history of the theory and its anatomical basis and defending it against the claim that it rests upon an arbitrary decision as to what constitutes the biological substratum of mind or person.

This innovative work takes a new approach to a fundamental dilemma of physiology, psychology, and philosophy: the subjectively perceived split between body and mind. Examining the subjective and objective aspects of movement and their relationship to our perception of mind-body separation, the author takes issue with conventional philosophical views on human duality and develops an integrative theory of interaction that suggests a basis for genuine mind-body harmony.

We present a hypothetical process of mind coalescence, where arti cial connections are created between two or more brains. This might simply allow for an improved form of communication. At the other extreme, it might merge the minds into one in a process that can be thought of as a reverse split-brain operation. We propose that one way mind coalescence might happen is via an exocortex, a prosthetic extension of the biological brain which integrates with the brain as (...) seamlessly as parts of the biological brain integrate with each other. An exocortex may also prove to be the easiest route for mind uploading, as a person's personality gradually moves away from the aging biological brain and onto the exocortex. Memories might also be copied and shared even without minds being permanently merged. Over time, the borders of personal identity may become loose or even unnecessary. (shrink)

Descartes bequeathed to his successors what he and they thought to be a sharp, deep split between the mental and the material. He thought it was a split between things, with every thing belonging to one of the two kinds and no thing belonging to both. According to him, a human being is a pair, a duo, a mind and a body; or, more strictly, a human being is a mind that is tightly related to an animal body. (...) The exact nature of that relation was one of the problems that Descartes never solved to his own satisfaction, let alone to anyone else’s. Not all of those who took over the split thought that it was a split through things. It was possible to hold - as I am sometimes inclined to - that material properties are radically different from mental properties, neither being reducible to the other, and yet there are single things, not pairs or duos or small committees, that have properties of both kinds. In the language of the 17th century, that is the belief that matter can think, i.e. that an item that bumps and shoves its way through space can also be the subject of thoughts and experiences and perceptions. In that century an impressive amount of intellectual energy went into debating whether matter could think. I’m going to pick out of that debate certain strands that I hope are still of interest today. They certainly interest me. Such understanding as I have of the philosophy of mind - I mean of what is actually true about mentality, not merely of the history of men’s opinions about it - has come from tracking some of the 17th century writers as they beat their way through the undergrowth. I don’t mean that they eventually led me to true conclusions, which I gratefully swallowed. They got most things wrong, I believe; but there is a lot to be learned from working out where they were wrong and why. (shrink)

We explore the complexity of Sacks’ Splitting Theorem in terms of the mind change functions associated with the members of the splits. We prove that, for any c.e. set A, there are low computably enumerable sets $A_0\sqcup A_1=A$ splitting A with $A_0$ and $A_1$ both totally $\omega ^2$ -c.a. in terms of the Downey–Greenberg hierarchy, and this result cannot be improved to totally $\omega $ -c.a. as shown in [9]. We also show that if cone avoidance is added then there (...) is no level below $\varepsilon _0$ which can be used to characterize the complexity of $A_1$ and $A_2$. (shrink)

This book explores a neglected philosophical question: How do groups of interacting minds relate to singular minds? Could several of us, by organizing ourselves the right way, constitute a single conscious mind that contains our minds as parts? And could each of us have been, all along, a group of mental parts in close cooperation? Scientific progress seems to be slowly revealing that all the different physical objects around us are, at root, just a matter of the (...) right parts put together in the right ways: How far could the same be true of minds? This book argues that we are too used to seeing the mind as an indivisible unity and that understanding our place in nature requires being willing to see minds as composite systems, simultaneously one conscious whole and many conscious parts. In thinking through the implications of such a shift of perspective, the book relates the question of mental combination to a range of different theories of the mind (in particular panpsychism, functionalism, and Neo-Lockeanism about personal identity) and identifies, clarifies, and addresses a wide array of philosophical objections (concerning personal identity, the unity of consciousness, the privacy of experience, and other issues) that have been raised against the idea of composite minds. The result is an account of the metaphysics of composition and consciousness that can illuminate many different debates in philosophy of mind, concerning split brains, collective intentionality, and the combination problem, among others. (shrink)

In this commentary I use recent empirical evidence and theoretical analyses concerning the importance of language and the meaning of self-recognition to reevaluate the claim that the right mute hemisphere in commissurotomized patients possesses a full consciousness. Preliminary data indicate that inner speech is deeply linked to self-awareness; also, four hypotheses concerning the crucial role inner speech plays in self-focus are presented. The legitimacy of self-recognition as a strong operationalization of self-awareness in the right hemisphere is also questioned on the (...) basis that it might rather tap a preexisting body awareness having little to do with an access to mental events. I conclude with the formulation of an alternative interpretation of commissurotomy according to self-awareness — a “complete” one in the left hemisphere and a “primitive” one in the right hemisphere. (shrink)

Naturalism concerning the mental is the belief that the tools and concepts of natural science are necessary to achieve an understanding of the mind. After briefly setting the stage of naturalism and the mind, I pose the question of naturalism about the mind in its historical context, comparing the development of naturalist approaches to philosophy of mind to Russell's “hiving off” model of the history of Western philosophy, in which parts of philosophy have split away from the field as (...) we have developed new ways to answer questions once central to philosophy. Next, after distinguishing ontological from methodological senses of naturalism, I explore a number of different 20th‐century naturalist approaches to studying the mind, ending with a discussion of eliminative materialism and its stress on the continuity of scientific (naturalist) and commonsense understandings of the mind. (shrink)

This paper contributes to a growing body of literature focusing on Anton Wilhelm Amo’s account of the mind-body relation. The first aim of this paper is to provide an overview of that literature, bringing together several interpretations of Amo’s account of the mind-body relation and providing a comprehensive overview of where the debate stands so far. Doing so reveals that commentary is split between those who take Amo to adopt a Leibnizian account of pre-established harmony between mind and body (...) (Smith 2015, Emma-Adamah 2015) and those who argue that Amo adopts a theory of occasional causation (Meyns 2019, Walsh 2019). Both views deny that the body is the efficient cause of the mind’s ideas but while the Leibnizian account holds that ideas exist innately in the mind, the occasional causation account maintains that the body is their occasional cause. That is, on this reading of Amo, sensations in the body are the ‘occasion’ on which the mind efficiently causes its own ideas. The second aim of this paper – which promises to take this interpretative debate in a new direction – is to demonstrate that we should in fact attribute to Amo a specific version of occasional causation known as 'concurrentism'. Concurrentism is the view that, while the mind does efficiently cause its own ideas, it can only do so with the assistance (or ‘concurrence’) of God. In other words, on this view, God makes possible the efficient causal activity of the human mind in generating ideas, in response to ‘occasions’ in the body. (shrink)

For ages there has been a gap between the two cultures of the sciences and religions. According to Roger Sperry, science can now bridge the gap between the cold hard facts of the sciences and humanitarian and religious values. Sperry won the Nobel Prize in 1981 for his work on the differences between the left and right halves of the brain. For the past twenty years he has been campaigning for human consciousness and values to be investigated scientificlly. This book (...) describes Sperry's work and his struggle to guide humanity beyond a world divided. terms such as consciousness, value, love and joy are scientifically meaningful, just like terms referring to brain physiology, such as neural pathways and electrical impulse. The split between mind matter, or religion, and science can be removed, says Sperry, by expanding scientific research. Now, conscious experiences must be taken into account as scientific information about the brain. Our values, beliefs and goals can directly affect our brain states and physiology. (shrink)

The conflict and dissociation between the Body and the Mind have determinant implications in the context of our current clinical practice, and are an important source of internal and relational disturbances. Body-Mind Dissociation in Psychoanalysis proposes the concept as a new hypothesis, different from traumatic dissociation or states of splitting. This approach opens the door to a clinical confrontation with extreme forms of mental disturbance, such as psychosis or borderline disorders, and strengthens the relational power of the analytic encounter, through (...) a focus on the internal sensory/emotional axis in both analyst and analysand. The book details this importance of the analyst's intrasubjective relationship with the analysand in constructing new developmental horizons, starting from the body-mind exchange of the two participants. Body-Mind Dissociation in Psychoanalysiswill be of use to students, beginners in psychotherapy, mental health practitioners and seasoned psychoanalysts. (shrink)

An examination of split-brain syndrome, and whether split-brain patients have two minds.

Mind-wandering is often seen as the result of a certain attention behavior or even an attention deficit. However, Gestalt psychological research points to other explanations: The phenomena referred to as “mind-wandering” can be understood as a reorganization of the total phenomenal field of perception and experience as a result of experiencing serious discrepancies in this field (“non-Prägnanz” or “Imprägnanzen” in Gestalt psychological terminology). If the “non-Prägnanz” in the field is strong enough, the related facts and events are experienced as not (...) being compatible in a single common field. As a consequence, the field of perception and experience is split into two or more fields, each comprising its own phenomenal ego with its own phenomenal world. This approach allows the identification of certain rules for the occurrence of these phenomena and an informed handling of them. The paper introduces this Gestalt psychological multiple-field approach and discusses its conditions, implications, and potential applications. Examples from Gestalt theoretical psychotherapy, in the context of which this approach was developed in a differentiated way, and from other areas of application, serve as illustrations. (shrink)

This paper considers the technologically-mediated constitution of auditory experience based on the analogy of a healthy natural soundscape as a well-balanced orchestra in which living creatures use the full range of acoustic frequencies to communicate and survive. Using the idea of (inner) horizonality proposed by Edmund Husserl, I argue that key technological inventions enabling the transmission and recording of sound made possible a new form of experience characterized by split horizonality. This new form of technologically-mediated auditory experience brought with (...) it potential for both creative expression and manipulation. A broader historical trend driven by technology towards individualization that culminated with our present-day experience of constantly connected mobile phones deeply embedded in our everyday lives calls into question the soundness of thinking of our technologically-mediated auditory worlds in terms of the analogy of a healthy natural soundscape as a well-balanced orchestra. (shrink)

This book is based on the work done by a group of British and Italian psychoanalysts who have been meeting twice yearly since 2003 to study clinically the relationship between the mind and the body of their patients The analytical dyad became the focus of a dialectical movement between body and mind and between subject and object. Containing contributions from a range of distinguished British and Italian analysts, this book covers such key topics as somatic symptoms, the embodied unconscious, bodily (...) expressions of affect, sexuality, violence, self-harm, suicide attempts, hypochondria, hysteria, anorexia and bulimia, splits and fragmentation associated with the body. The theoretical understanding is inspired by various psychoanalytic theoreticians, including Freud, M. Klein, Winnicott and Bion and their theories on sexuality, infantile sexuality, libido, aggressiveness, dead instinct, Oedipus complex and mother-child relationship. Offering new advances in theoretical thinking and practical applications for clinical work, this book will be essential for all psychoanalysts and mental health clinicians interested in understanding serious mental disturbance that is represented in the body. (shrink)

Any panpsychism building complex consciousness out of basic atoms of consciousness needs a theory of ‘mental chemistry’ explaining how this building works. This paper argues that split-brain patients show actual mental chemistry or at least give reasons for thinking it possible. The paper next develops constraints on theories of mental chemistry. It then puts forward models satisfying these constraints. The paper understands mental chemistry as a transformation consistent with conservation of consciousness rather than an aggregation perhaps followed by the (...) creation of something in addition. The paper suggests that this kind of mental chemistry alone yields a workable panpsychism. (shrink)

Important conceptual and metaphysical issues arise when we try to understand the mental lives of “split-brain” subjects. How many distinct streams of consciousness do they have? According to Elizabeth Schechter’s partial unity model, the answer is one. A related question is whether co-consciouness, in general, is transitive. That is, if α and β are co-conscious experiences, and β and γ are co-conscious experiences, must α and γ be co-conscious? According to Schechter, the answer is no. The partial unity model (...) faces some serious objections. Its underpinnings are suspect, and ways of working out the model fall into trouble of various sorts: incoherence, emptiness, or unacceptable indeterminacy about the identity of (token) conscious states. One apparent lesson is that a subject can host two distinct conscious experiences of the same sort. Another is that the co-consciousness relation is transitive after all. (shrink)

Love, fear, hope, calculus, and game shows-how do all these spring from a few delicate pounds of meat? Neurophysiologist Ian Glynn lays the foundation for answering this question in his expansive An Anatomy of Thought, but stops short of committing to one particular theory. The book is a pleasant challenge, presenting the reader with the latest research and thinking about neuroscience and how it relates to various models of consciousness. Combining the aim of a textbook with the style of a (...) popularization, it provides all the lay reader needs to know to participate in the philosophical debate that is redefining our attitudes about our minds. Drawing on the rich history of neurological case studies, Glynn picks through the building blocks of our nervous system, examines our visual and linguistic systems, and probes deeply into our higher thought processes. The stories of great scientists, like Ramon y Cajal, and famous patients, like Sperry's split-brained epileptics, illuminate the scientific issues Glynn selects as essential for understanding consciousness. Some might argue that his lengthy explorations of natural selection overemphasize evolutionary explanations of psychological phenomena, but they must also agree that evolutionary psychology has distanced itself mightily from social Darwinism in recent years and merits a reappraisal. The great consciousness debate may form the core of the 21st-century Zeitgeist; get ready for it with An Anatomy of Thought. -Rob Lightner From Publishers Weekly How do we know? What do we think? How could a philosophical problem-'the mind-body problem,' say-induce a headache? What can evolutionary theory, molecular biology, the history of medicine and experimental psychology tell us about the features of human consciousness, and (once again) how do we know? Glynn, a physician and Cambridge University professor, meticulously attempts to answer these questions and more, setting forth the results of all sorts of research relevant to our brains-from 19th-century dissections to Oliver Sacks-like case studies, work with monkeys and supercomputers, and the enduring puzzles of philosophy, which he rightly saves for near the end. After explaining evolution by natural selection and 'clearing away much dross,' Glynn lays out the experiments and theories that have shown 'how nerve cells can carry information about the body, how they can interact' and how sense organs work; demonstrates the 'mixture of parallel and hierarchical organization' in our brains and 'the striking localization of function within it'; considers where neuroscience is likely to go; and admits that, among the many fields of exciting research just ahead, 'we can be least confident of progress toward a complete, scientific explanation of our sensations and thoughts and feelings.' Other recent explaining-the-brain books have sometimes advanced simplistic, or implausibly grand, claims about the nature and features of consciousness in general. Instead, Glynn offers a patient, informative, well-laid-out researcher's-eye view of what we have learned, how we figured it out and what we still don't know about neurons, senses, feelings, brains and minds. (Apr.) Copyright 2000 Reed Business Information, Inc. From Library Journal The nature of consciousness, which perennially troubles the minds of scientists and philosophers, is the subject of an ever-growing body of literature. Two of the latest entries approach the topic from different perspectives. Glynn, a professor of physiology and head of the Physiological Laboratory at Cambridge, offers a comprehensive summary of what we know about the brain-both its evolution and its mechanisms. Among the topics he covers are natural selection, molecular evolution, nerves and the nervous system, sensory perception, and the specific structures responsible for our intellect. Using the mechanisms involved in vision and speech as models, Glynn skillfully describes various neurological deficiencies that can lead to 'disordered seeing' and problems with the use of language. He carefully distinguishes what we know through experimental evidence from what we know through the observation of patients with neurological damage. He also describes some of the major theories that attempt to explain why these structures arose. While his book concentrates on the structures that make up the mind, Glynn is well aware that some physical events appear explicable only in terms of conscious mental events-a situation that conflicts with the laws of modern physics. Only briefly, however, does he consider the various approaches that have been taken to deal with the issues of mind/body and free will. In contrast, this is the primary focus of The Physics of Consciousness. After reviewing the fundamentals of classic physics, Walker (who has a Ph.D. in physics) summarizes elements of the new physics in which our knowledge of space, time, matter, and energy are all dependent on the moment of observation. Walker explores the meaning of consciousness as a characteristic of the observer. In this context both the observer and the act of measurement are critical. In essence, Walker leads his reader on a journey through his concept of a 'quantum mind,' which can both affect matter (including other minds) and can be affected by other distant matter/minds. To break up what would otherwise be an extremely dense text, Walker also relates the very touching story of the loss of his high-school sweetheart to leukemia. Indeed, it is his memory of their relationship that drives Walker to seek an understanding of ultimate reality. At times, he has a tendency to be dogmatic-as when he concludes, 'our consciousness, our mind, and the will of God are the same mind.' While An Anatomy of Thought is appropriate for most academic libraries, the Physics of Consciousness will be most accessible to readers with some knowledge of advanced physics. -Laurie Bartolini, Illinois State Lib., Springfield Copyright 2000 Reed Business Information, Inc. From Booklist The codiscoverers of natural selection-Charles Darwin and Alfred Wallace-disagreed over the possibility of finding an evolutionary explanation for the human mind. Glynn here argues Darwin's side of the debate, tracing an eons-long path of development starting from simple amino acids floating in primal seas and extending through the erect hominids in which the powers of a massive brain first manifest themselves. Patiently adducing evidence of an evolutionary origin for the underlying molecular machinery, Glynn dissects the nerve centers that make possible speech and hearing, sight, and reading. Pressing deeper, he lays bare the cortical foundations of personality. But those who deal with the mind must attend also to the arguments advanced by philosophers. And it is when he turns from dendrites to syllogisms (especially the vexing mind-body paradox) that Glynn's empirical reasoning fails him. In the end, he concedes his perplexity in trying to conceive of an evolutionary origin for human consciousness. This concession may set the shade of Alfred Wallace to chortling, but it will draw readers into an honest confrontation with a profound enigma. Bryce Christensen. (shrink)

In biology, man is an object of research; therefore the question might be asked whether inspirations can go from biological data to the reflections on the mind-matter relation in man. The social aspect of man, as treated by sociobiology, is left out of consideration. The knowledge that man is mind, or has a mind, is no result of biological research. It is a datum from philosophy. The biologist, however, is living in a culture which knows about the mental character of (...) man, and this is incorporated in his investigations. He knows that mental activities are connected with processes in the central nervous system and that, especially in the brain, localizations of mental activities are found. As a result of the split-brain experiments with patients and animals, some have arrived at the conclusion that there is a double consciousness.An approach from biology can lead to statements of a philosophical character, as, for example, statements about the unity, or even identity, of mind and matter. The theories of identity meet with great interest in scientific circles, and the truth value of identity statements is investigated. The system theory is taken into consideration. On a philosophical level a revaluation of the concept of matter can lead to a different sort of identity theory. (shrink)

Although its subject is the relationship between philosophy and comedy, this essay is neither flippant nor nihilistic. It instead approaches philosophy through themes borrowed from comedy, including chapters on inversion, paradox, madness, nonsense, and the distinction between appearance and reality. Beyond his authorship of two previous books on theories of comedy (Madness, Masks, and Laughter and Split Down the Sides), Glasgow's credentials are not stated. Annotation copyrighted by Book News, Inc., Portland, OR.