Brain Arousal and Information Theory: Neural and Genetic Mechanisms

by Donald Pfaff

Overview

Arousal is fundamental to all cognition. It is intuitively obvious, absolutely necessary, but what exactly is it? In Brain Arousal and Information Theory, Donald Pfaff presents a daring perspective on this long-standing puzzle. Pfaff argues that, beneath our mental functions and emotional dispositions, a primitive neuronal system governs arousal. Employing the simple but powerful framework of information theory, Pfaff revolutionizes our understanding of arousal systems in the brain.

Starting with a review of the neuroanatomical, neurophysiological, and neurochemical components of arousal, Pfaff asks us to look at the gene networks and neural pathways underlying the brain’s arousal systems much as a design engineer would contemplate information systems. This allows Pfaff to postulate that there is a bilaterally symmetric, bipolar system universal among mammals that readies the animal or the human being to respond to stimuli, initiate voluntary locomotion, and react to emotional challenges. Applying his hypothesis to heightened states of arousal—sex and fear—Pfaff shows us how his theory opens new scientific approaches to understanding the structure of brain arousal.

A major synthesis of disparate data by a preeminent neuroscientist, Brain Arousal and Information Theory challenges current thinking about cognition and behavior. Whether you subscribe to Pfaff’s theory or not, this book will stimulate debate about the nature of arousal itself.

Product Details

ISBN-13:	9780674042100
Publisher:	Harvard University Press
Publication date:	07/01/2009
Sold by:	Barnes & Noble
Format:	eBook
Pages:	217
File size:	2 MB

About the Author

Donald Pfaff is Professor of Neurobiology and Behavior at The Rockefeller University in New York City.

Table of Contents

SToward a Universal Theory of Brain Arousal 1 What Is to Be Explained? Ethology and the Mechanisms of Arousal 2 Operational Definition of Arousal 4 A Quantitative Approach to Physical Measurement of Generalized Arousal 6 The Neurobiology of Arousal Constitutes an Interesting Application of Information Theory 13 Claims for This Chapter and Introduction to Chapters Following 24 D Anatomy Is Not Destiny, but a Little Neuroanatomy Helps 26 Multiplicity and Redundancy of Ascending Arousal Pathways Prevent Failure 26 Primitive "Master Cells" in the Brainstem Provide a Neuroanatomic Core that Theoretically Matches the Behavioral Data 42 Long-Distance Lines Tuning Local Modules 48 Summary and Hypothetical Implications for Human Behavior 51 f Arousal Is Signaled by Electrical Discharges in a System of Nerve Cells 55 Traveling Up the Brainstem 56 Special Cases: Olfaction and Vision 65 Informational Content Governs Amplitude of Response in Neurons Related to Arousal 66 Cerebral Cortex, the EEG 68 Electrical Activity in Three Arousal-Related Biological Systems 68 U Autonomic Nervous System Changes Supporting Arousal; the Unity of the Body 71 Patterns of Autonomic Responses 72 Reformulations 77 A High Information System Shows Coordination sans Correlation 78 Supporting Hormone-Dependent Behaviors 81 Summary 82 f Genes Whose Neurochemical Products Support Arousal 83 Genes Associated with Classical Systems 83 Genes Newly Recognized 90 Concepts and Questions 95 Summary 98 f Heightened States of Arousal: Sex Compared to Fear 99 Sex Behavior's CNS Mechanisms Require Arousal 100 Generalized Arousal Affects Specific Arousals and Vice Versa 107 Contrast Sex and Fear 115 Applicability of Information Theory 119 Libido and Stress in Humans 120 Summary 124 * Major Systems Questions about Brain Arousal Networks 125 What Are Universal Operating Features of Arousal Systems? 126 How Do We Meet the Requirement for Rapid Changes of CNS State? 129 Sensitivity and Alacrity of Response, Yet Stability? How? 131 Does Automata Theory Apply? 132 Questions in the Time Domain 136 Questions about Spatial Properties 137 Thermodynamics, Information Theory, and Questions for the CNS 138 How Does a Sine Wave Impact a Sawtooth? 140 Unity from Diversity? 141 H Summary and Practical Importance: From Biological Mechanisms to Health Applications 143 Main Points 143 Applications to Human Conditions 147

What People are Saying About This

Donald Pfaff provides fresh ideas for the framework of an old concept,"arousal". He takes the reader through the history of how the concept evolved and embraces the modern era by incorporating genetic findings into the established neurobiology underpinning arousal. This is not simply a review of the subject but a synthesis of old and new experimental findings to provide new ideas generated by a deep understanding of the subject. Updating ones knowledge is a pleasing experience, but being provoked to reconsider the subject in a new way is intellectually rewarding. Donald
Pfaff achieves this distinction in Brain Arousal and Information Theory.

Editorial Reviews

The author’s contribution to our understanding of arousal mechanisms [is] both innovative and challenging… His most remarkable contributions are his repeated mention of the interplay between arousal systems and manifestations of cognition and emotion, his focus on information theory as a means of understanding arousal systems as universal response potentiators, with bilateral and bipolar properties. This book will be read avidly by those who are interested in any of the above-mentioned issues and by those who simply want to get a fresh look at the concept of arousal. In either case, the author’s intentions will be unmistakable: challenging readers to combine evidence from different fields and integrate it into a series of questions to guide much-needed research.

Metapsychology Online - Maura Pilotti

Donald Pfaff provides fresh ideas for the framework of an old concept, ‘arousal.’ He takes the reader through the history of how the concept evolved and embraces the modern era by incorporating genetic findings into the established neurobiology underpinning arousal. This is not simply a review of the subject but a synthesis of old and new experimental findings to provide new ideas generated by a deep understanding of the subject. Updating one’s knowledge is a pleasing experience, but being provoked to reconsider the subject in a new way is intellectually rewarding. Donald Pfaff achieves this distinction in Brain Arousal and Information Theory.

E. B. Keverne

Donald Pfaff’s book is highly innovative. He addresses a classic problem in neurobiology which has lain fallow for decades. Central nervous system arousal is fundamental to emotional and cognition yet I don’t know of any other book or article that so thoroughly delineates the mechanisms and function of arousal in the brain. In addition to reviewing a huge body of neuroanatomical, neuropsychological and genetic data, Pfaff proposes a daring new theoretical approach based on information theory. Despite the technical nature of the book, Pfaff’s main points are easy to understand. Pfaff has virtuoso command of the literature and has given us a brilliant set of new thoughts.

Dr. Helen Fisher

Brain Arousal and Information Theory is a major step in the development of the 24-hour model of mental behavior that Freud envisioned and that psychology has ignored until now because of lack of data… Although this volume does not do it all, it does fill in some of the understanding of the complex brain mechanisms behind mental behaviors. As such it is a big step in support of those who have argued for the continuity of cognition across the wake-sleep states as well as affect regulation. Once they accept the challenge of accounting for cognition and emotional behavior across the 24-hour cycle, researchers into brain–behavior relations will find this book to be a resource of value.

PsycCRITIQUES - Rosalind Cartwright