Self Comes to Mind: Constructing the Conscious Brain [Rauer Buchschnitt] [Englisch] [Gebundene Ausgabe]

The deep enigma of consciousness has been explored from many directions, including contributions by neuroscientists, psychologists, philosophers and a few physicists (both quantum and complex systems scientists). An important study area consists of injuries or diseases that destroy specific brain structures; these clinical events are often closely correlated to nuanced effects on selective aspects of consciousness. Professor Damasio's book makes good use of these data to describe many known neural correlates of consciousness. For purposes of this book, he adopts the working hypothesis that mental states and brain states are essentially equivalent. While many (including this reviewer) find this idea questionable, such tentative hypothesis is quite appropriate for a book of this kind. In science we often adopt useful, if highly oversimplified, models in the early stages of our studies with no illusions that they are perfectly accurate. In this manner "Truth" is (hopefully) approached in a series of successive approximations. Thankfully, Damasio does not claim to "explain" consciousness.

The book's title is based on Damasio's suggestion that our evolutionary history reveals many simple creatures with active "minds" (defined broadly), but only much later did self (awareness) develop; in other words the human self is built in steps grounded in the so-called "protoself." An essential step is the development of homeostatis (life regulation needed to survive) in single cell creatures like bacteria, followed by progressively more complex "societies of cells" in more complex creatures like insects, reptiles, and mammals. Thus consciousness, rooted in our evolutionary past, helps to optimize our responses to the environment so that we may continue our existence. Damasio also describes the self in terms of stages: the protoself, core self and autobiographical self, along with specific brain structures that may support these distinct stages. He concludes that conscious minds emerge from the brain's nested hierarchy of neural networks operating at multiple spatial scales (levels); I will expand on this last point later.

Several chapters consider brain structures that are most essential to mind and consciousness, providing more status to the brain stem and its sub structures than is normally acknowledged by neuroscientists. Damasio's arguments here are based on observations of children born without a cerebral cortex and on several evolutionary considerations. The book cites quite a bit of detailed brain anatomy so non experts should probably read the excellent Appendix on brain structure before tackling any material beyond chapter 2. Normally this suggestion would be offered in a Preface, but this book has none.

I gave the book four stars based on my evaluation of both the good and not so good features: 1) the nice development of a number of important ideas on conscious correlates, 2) the fluff, e.g., some unnecessary technical jargon and the belaboring of obvious points, 3) important omissions. In an example of the latter, I found the memory chapter inadequate given its central role in consciousness. I would have liked to read more about how, where, and at what spatial scales are various kinds of memory stored, or at least given some sense of which parts of the memory puzzle have actually been solved. By loose analogy, if I ask how a TV works, I am unsatisfied by explanations of how to dial in specific channels. Rather, I want to hear about electromagnetic fields and electron guns.

Many readers avoid Endnotes; this may be a mistake. Here is one shining gem involving an interchange between Damasio and Francis Crick, who pointed to several provocative definitions in the International Dictionary of Psychology (1996), providing both these guys quite a laugh. I will not spoil the story by relating the dictionary's definition of "consciousness," but here is this dictionary's definition of "love," "A form of mental illness not yet recognized by any of the standard diagnostic manuals." (Note to my wife, I do not endorse this definition.)

The apparent critical importance of the brain's nested hierarchy to consciousness seemed to me to be substantially understated in Damisio's book. I say this because nested hierarchy is a hallmark of many if not most complex systems, and brains are considered by most to be the pre-eminent complex systems. Think of social systems, for example. They typically consist of persons, neighborhoods, cities, states and nations; their observed dynamic behaviors are fractal-like (scale dependent) and the essence of their behaviors is rooted in the nested hierarchy of interactions at multiple scales, both top-down and bottom-up, the so-called "circular causality" of Synergetics, the science of cooperation and self organization (see books by Hermann Haken). The brain's nested hierarchy and its apparent critical importance to consciousness are discussed in Todd Feinberg's From Axons to Identity: Neurological Explorations of the Nature of the Self (Norton Series on Interpersonal Neurobiology) and my new book (2010), which also explores the possible fundamental role of information in both the physical and mental realms. This latter topic is also covered in a series of essays edited by Paul Davies and Neils Gregersen Information and the Nature of Reality: From Physics to Metaphysics, 2010.

An alternate view of Damasio's book by Steven Rose was posted February 16, 2011 on this site (an excellent read for those interested in the hard problem).

Dr. Damasio says that, "This book is dedicated to addressing two questions. First: how does the brain construct a mind? Second: how does the brain make that mind conscious?" Do I think he does an exceptional job of tackling these two questions? Yes, I do.

I believe the greatest strength of this book lies in Dr. Damasio's capacity to take account of vast amounts of information and viewpoints related to mind and consciousness. He has included large swaths of issues that are usually books in and of themselves (Body Maps - The Body Has a Mind of Its Own: How Body Maps in Your Brain Help You Do (Almost) Everything Better, Extended/Embodied Cognition - The Extended Mind (Life and Mind: Philosophical Issues in Biology and Psychology), Efficient Computational Theory of Mind - Your Brain Is (Almost) Perfect: How We Make Decisions, Selfhood - The Ego Tunnel: The Science of the Mind and the Myth of the Self, Free Will - Distributed Cognition and the Will: Individual Volition and Social Context (Bradford Books), Neuroeconomics - Rationality for Mortals: How People Cope with Uncertainty (Evolution and Cognition Series) and Neuroanatomy - Mapping the Mind: Revised and Updated Edition). Furthermore, Dr. Damasio is very forthcoming in demarcating the known from the unknown and the probable from the possible in regards to neuroscience. The only downside I experienced while reading this book is that I felt a little lost, or perhaps impatient, while waiting for Damasio to tie everything together. It was only towards the last half of the book that the big picture began to emerge.

That being said, I believe that this book is a significant advancement in neuroscientific research. Most importantly, I actually understand what Damasio means when he speaks of the proto self, core self, and autobiographical self. His explanation of Convergence-Divergence Zones (CDZ's), as well as anatomical structures, is very effective and his manner of description is so unsophisticated that even a layman like me can understand exactly what he is illustrating. Also, there are many pictures, diagrams, and charts to help too.

In conclusion, I very much enjoyed the substance of this book (the style is somewhat lacking, but hey, it's not supposed to be Shakespeare!). I also took pleasure in the way in which Damasio took a back-handed approach to dismissing a certain philosophers (Daniel Dennett, ahem) approach towards consciousness; I liked it because when it comes to Mind/Brain/Consciousness issues, I think philosophers must necessarily take a supporting role to the neuroscientists. "I see the neurology of consciousness as organized around the brain structures involved in generating the lead triad of wakefulness, mind, and self. Three major anatomical divisions - the brain stem, the thalamus, and cerebral cortex - are principally involved, but one must caution that there are no direct alignments between each anatomical division and each component of the triad. All three divisions contribute to some aspect of wakefulness, mind, and self." A great book, I highly recommend it. (Also, if you liked this book, or think you would like this book, I would also recommend reading V.S. Ramachandran's new book: The Tell-Tale Brain: A Neuroscientist's Quest for What Makes Us Human.)

As I write this I am trying to assess the three previous reviews which were written by those more scholarly than I. That said, I encourage "bumblebee scholars" such as I to dig in to this seminal work. It can't hurt and might be good for you.

Cautionary Note: If you read the Endnotes you may construct a reading list that will prompt you to delay your demise for at least twenty years beyond your current biological expectancy.