Split Minds Split Brains

Could a single human being ever have multiple conscious minds? Some human beings do. The corpus callosum is a large pathway connecting the two hemispheres of the brain. In the second half of the twentieth century a number of people had this pathway cut through as a treatment for epilepsy. They became colloquially known as split-brain subjects. After the two hemispheres of the brain are cortically separated in this way, they begin to operate unusually independently of each other in the realm of thought, action, and conscious experience, almost as if each hemisphere now had a mind of its own. Philosophical discussion of the split-brain cases has overwhelmingly focused on questions of psychological identity in split-brain subjects, questions like: how many subjects of experience is a split-brain subject? How many intentional agents? How many persons? On the one hand, under experimental conditions, split-brain subjects often act in ways difficult to understand except in terms of each of them having two distinct streams or centers of consciousness. Split-brain subjects thus evoke the duality intuition: that a single split-brain human being is somehow composed of two thinking, experiencing, and acting things. On the other hand, a split-brain subject nonetheless seems like one of us, at the end of the day, rather than like two people sharing one body. In other words, split-brain subjects also evoke the unity intuition: that a split-brain subject is one person. Elizabeth Schechter argues that there are in fact two minds, subjects of experience, and intentional agents inside each split-brain human being: right and left. On the other hand, each split-brain subject is nonetheless one of us. The key to reconciling these two claims is to understand the ways in which each of us is transformed by self-consciousness.

Essays discuss witchcraft, shamanism, multiple personalities, dissociation in literature and history, and personality disorders caused by wartime experiences

In The Unity of Consciousness Tim Bayne draws on philosophy, psychology, and neuroscience in defence of the claim that consciousness is unified. In the first part of the book Bayne develops an account of what it means to say that consciousness is unified. Part II applies this account to a variety of cases - drawn from both normal and pathological forms of experience - in which the unity of consciousness is said to break down. Bayne argues that the unity of consciousness remains intact in each of these cases. Part III explores the implications of the unity of consciousness for theories of consciousness, for the sense of embodiment, and for accounts of the self. In one of the most comprehensive examinations of the topic available, The Unity of Consciousness draws on a wide range of findings within philosophy and the sciences of the mind to construct an account of the unity of consciousness that is both conceptually sophisticated and scientifically informed.

A new edition of the bestselling classic – published with a special introduction to mark its 10th anniversary This pioneering account sets out to understand the structure of the human brain – the place where mind meets matter. Until recently, the left hemisphere of our brain has been seen as the ‘rational’ side, the superior partner to the right. But is this distinction true? Drawing on a vast body of experimental research, Iain McGilchrist argues while our left brain makes for a wonderful servant, it is a very poor master. As he shows, it is the right side which is the more reliable and insightful. Without it, our world would be mechanistic – stripped of depth, colour and value.

Most people experience themselves as two sided, but have you ever wondered if there are really two minds in each of us? Schiffer gives us overwhelming evidence that each side of our brain possesses an autonomous, distinct personality. This brilliant, provocative book illustrates how the interaction of these two minds actually determines our psychological nature and the emotional problems we may experience. OF TWO MINDS transforms our understanding of how and why we experience emotional distress, and suggests a path to a more harmonious relationship between our two selves.

Could a single human being ever have multiple conscious minds? Some human beings do. The corpus callosum is a large pathway connecting the two hemispheres of the brain. In the second half of the twentieth century a number of people had this pathway cut through as a treatment for epilepsy. They became colloquially known as split-brain subjects. After the two hemispheres of the brain are cortically separated in this way, they begin to operate unusually independently of each other in the realm of thought, action, and conscious experience, almost as if each hemisphere now had a mind of its own. Philosophical discussion of the split-brain cases has overwhelmingly focused on questions of psychological identity in split-brain subjects, questions like: how many subjects of experience is a split-brain subject? How many intentional agents? How many persons? On the one hand, under experimental conditions, split-brain subjects often act in ways difficult to understand except in terms of each of them having two distinct streams or centers of consciousness. Split-brain subjects thus evoke the duality intuition: that a single split-brain human being is somehow composed of two thinking, experiencing, and acting things. On the other hand, a split-brain subject nonetheless seems like one of us, at the end of the day, rather than like two people sharing one body. In other words, split-brain subjects also evoke the unity intuition: that a split-brain subject is one person. Elizabeth Schechter argues that there are in fact two minds, subjects of experience, and intentional agents inside each split-brain human being: right and left. On the other hand, each split-brain subject is nonetheless one of us. The key to reconciling these two claims is to understand the ways in which each of us is transformed by self-consciousness.

Featuring numerous updates and enhancements, Science Fiction and Philosophy, 2nd Edition, presents a collection of readings that utilize concepts developed from science fiction to explore a variety of classic and contemporary philosophical issues. Uses science fiction to address a series of classic and contemporary philosophical issues, including many raised by recent scientific developments Explores questions relating to transhumanism, brain enhancement, time travel, the nature of the self, and the ethics of artificial intelligence Features numerous updates to the popular and highly acclaimed first edition, including new chapters addressing the cutting-edge topic of the technological singularity Draws on a broad range of science fiction’s more familiar novels, films, and TV series, including I, Robot, The Hunger Games, The Matrix, Star Trek, Blade Runner, and Brave New World Provides a gateway into classic philosophical puzzles and topics informed by the latest technology

Thinkers as diverse as C.P. Snow, J. Bronowski, and Carl Sagan have described the rift between the “two cultures” of science and the humanities as the greatest barrier to solving the many problems threatening today’s world. During the last two decades of his life, Nobel laureate Roger W. Sperry – best known for his pioneering split-brain studies that highlighted the differing aptitudes of the two hemispheres of the human brain – turned his energies to this dilemma. Sperry’s ideas about consciousness challenged the behaviorist orthodoxy that prevailed in psychology in the 1950s and ’60s, and provided a way of understanding the relationship between brain and mind that not only more accurately reflected reality, but also promised a reconciliation between the conflicting claims of hard-edged objective fact and the realm of human emotion and subjective experience. Beyond A World Divided chronicles the neuroscientist’s groundbreaking research, his efforts to refine and win acceptance for his ideas, and his struggle to advance his work despite the onslaught of the degenerative nerve disease that eventually killed him. The book concludes by surveying the debate in the psychological and philosophical communities about the impact of Sperry’s ideas – a debate which still continues.

With extensive video footage of his trailblazing cognitive experiments, Michael Gazzaniga—the “father of cognitive neuroscience”—illuminates the discoveries behind his groundbreaking work in this enhanced digital edition of Tales from Both Sides of the Brain. Michael S. Gazzaniga, one of the most important neuroscientists of the twentieth century, gives us an exciting behind-the-scenes look at his seminal work on that unlikely couple, the right and left brain. Foreword by Steven Pinker. In the mid-twentieth century, Michael S. Gazzaniga, “the father of cognitive neuroscience,” was part of a team of pioneering neuroscientists who developed the now foundational split-brain brain theory: the notion that the right and left hemispheres of the brain can act independently from one another and have different strengths. In Tales from Both Sides of the Brain, Gazzaniga tells the impassioned story of his life in science and his decades-long journey to understand how the separate spheres of our brains communicate and miscommunicate with their separate agendas. By turns humorous and moving, Tales from Both Sides of the Brain interweaves Gazzaniga’s scientific achievements with his reflections on the challenges and thrills of working as a scientist. In his engaging and accessible style, he paints a vivid portrait not only of his discovery of split-brain theory, but also of his comrades in arms—the many patients, friends, and family who have accompanied him on this wild ride of intellectual discovery.

In this 10,000-word essay, written to complement Iain McGilchrist's acclaimed The Master and His Emissary, the author asks why - despite the vast increase in material well-being - people are less happy today than they were half a century ago, and suggests that the division between the two hemispheres of the brain has a critical effect on how we see and understand the world around us. In particular, McGilchrist suggests, the left hemisphere's obsession with reducing everything it sees to the level of minute, mechanistic detail is robbing modern society of the ability to understand and appreciate deeper human values. Accessible to readers who haven't yet read The Master and His Emissary as well as those who have, this is a fascinating, immensely thought-provoking essay that delves to the very heart of what it means to be human.