Human Language And Our Reptilian Brain

This book is an entry into the fierce current debate among psycholinguists, neuroscientists, and evolutionary theorists about the nature and origins of human language. A prominent neuroscientist here takes up the Darwinian case, using data seldom considered by psycholinguists and neurolinguists to argue that human language--though more sophisticated than all other forms of animal communication--is not a qualitatively different ability from all forms of animal communication, does not require a quantum evolutionary leap to explain it, and is not unified in a single language instinct. Using clinical evidence from speech-impaired patients, functional neuroimaging, and evolutionary biology to make his case, Philip Lieberman contends that human language is not a single separate module but a functional neurological system made up of many separate abilities. Language remains as it began, Lieberman argues: a device for coping with the world. But in a blow to human narcissism, he makes the case that this most remarkable human ability is a by-product of our remote reptilian ancestors' abilities to dodge hazards, seize opportunities, and live to see another day.

This book synthesizes much of the exciting recent research in the biology of language. Drawing on data from anatomy, neurophysiology, physiology, and behavioral biology, Philip Lieberman develops a new approach to the puzzle of language, arguing that it is the result of many evolutionary compromises. Within his discussion, Lieberman skillfully addresses matters as various as the theory of neoteny (which he refutes), the mating calls of bullfrogs, ape language, dyslexia, and computer-implemented models of the brain.

In this forcefully argued book, the leading evolutionary theorist of language draws on evidence from evolutionary biology, genetics, physical anthropology, anatomy, and neuroscience, to provide a framework for studying the evolution of human language and cognition. Philip Lieberman argues forcibly that the widely influential theories of language's development, advanced by Chomskian linguists and cognitive scientists, especially those that postulate a single dedicated language "module," "organ," or "instinct," are inconsistent with principles and findings of evolutionary biology and neuroscience. He argues that the human neural system in its totality is the basis for the human language ability, for it requires the coordination of neural circuits that regulate motor control with memory and higher cognitive functions. Pointing out that articulate speech is a remarkably efficient means of conveying information, Lieberman also highlights the adaptive significance of the human tongue. Fully human language involves the species-specific anatomy of speech, together with the neural capacity for thought and movement. In Lieberman's iconoclastic Darwinian view, the human language ability is the confluence of a succession of separate evolutionary developments, jury-rigged by natural selection to work together for an evolutionarily unique ability.

In a stimulating synthesis of cognitive science, anthropology, and linguistics, Philip Lieberman tackles the fundamental questions of human nature: How and why are human beings so different from other species? Can the Darwinian theory of evolution explain human linguistic and cognitive ability? How do our processes of language and thought differ from those of Homo erectus 500,000 years ago, or of the Neanderthals 35,000 years ago? What accounts for human moral sense? Lieberman believes that evolution for rapid, efficient vocal communication forged modern human beings by creating the modern human brain. Earlier hominids lacked fully human speech and syntax, which together allow us to convey complex thoughts rapidly. The author discusses how natural selection acted on older brain mechanisms to produce a structure that can regulate the motor activity necessary for speech and command the complex syntax that enhances the creativity of human language. The unique brain mechanisms underlying human language also enhance human cognitive ability, allowing us to derive abstract concepts and to plan complex activities. These factors are necessary for the development of true altruism and moral behavior. Lieberman supports his argument about the evolution of speech and the human brain by combining the comparative method of Charles Darwin, insights from archaeology and child development, and the results of high-tech research with computerized brain scanning and computer models that can recreate speech sounds made by our ancestors over 100,000 years ago. Uniquely Human will stimulate fresh thought and controversy on the basic question of how we came to be.

"This is MacLean's major work on the evolutionary development of the human brain. In its evolution the human forebrain expands along the lines of three basic formations that anatomical and biochemically reflect an ancestral relationship, respectively, to reptiles, early mammals, and late mammals. MacLean describes this as the Triune Brain."--Amazon.com viewed July 29, 2020

Few people have done as much to change how we view the world as Charles Darwin. Yet On the Origin of Species is more cited than read, and parts of it are even considered outdated. In some ways, it has been consigned to the nineteenth century. In The Theory That Changed Everything, the renowned cognitive scientist Philip Lieberman demonstrates that there is no better guide to the world’s living—and still evolving—things than Darwin and that the phenomena he observed are still being explored at the frontiers of science. In an exploration that ranges from Darwin’s transformative trip aboard the Beagle to Lieberman’s own sojourns in the remotest regions of the Himalayas, this book relates fresh, contemporary findings to the major concepts of Darwinian theory, which transcends natural selection. Drawing on his own research into the evolution of human linguistic and cognitive abilities, Lieberman explains the paths that adapted human anatomy to language. He demystifies the role of recently identified transcriptional and epigenetic factors encoded in DNA, explaining how nineteenth-century Swedish famines alternating with years of plenty caused survivors’ grandchildren to die many years short of their life expectancy. Lieberman is equally at home decoding supermarket shelves and climbing with the Sherpas as he discusses how natural selection explains features from lactose tolerance to ease of breathing at Himalayan altitudes. With conversational clarity and memorable examples, Lieberman relates the insights that led to groundbreaking discoveries in both Darwin’s time and our own while asking provocative questions about what Darwin would have made of controversial issues today, such as GMOs, endangered species, and the God question.

The brain ... There is no other part of the human anatomy that is so intriguing. How does it develop and function and why does it sometimes, tragically, degenerate? The answers are complex. In Discovering the Brain, science writer Sandra Ackerman cuts through the complexity to bring this vital topic to the public. The 1990s were declared the "Decade of the Brain" by former President Bush, and the neuroscience community responded with a host of new investigations and conferences. Discovering the Brain is based on the Institute of Medicine conference, Decade of the Brain: Frontiers in Neuroscience and Brain Research. Discovering the Brain is a "field guide" to the brainâ€"an easy-to-read discussion of the brain's physical structure and where functions such as language and music appreciation lie. Ackerman examines: How electrical and chemical signals are conveyed in the brain. The mechanisms by which we see, hear, think, and pay attentionâ€"and how a "gut feeling" actually originates in the brain. Learning and memory retention, including parallels to computer memory and what they might tell us about our own mental capacity. Development of the brain throughout the life span, with a look at the aging brain. Ackerman provides an enlightening chapter on the connection between the brain's physical condition and various mental disorders and notes what progress can realistically be made toward the prevention and treatment of stroke and other ailments. Finally, she explores the potential for major advances during the "Decade of the Brain," with a look at medical imaging techniquesâ€"what various technologies can and cannot tell usâ€"and how the public and private sectors can contribute to continued advances in neuroscience. This highly readable volume will provide the public and policymakersâ€"and many scientists as wellâ€"with a helpful guide to understanding the many discoveries that are sure to be announced throughout the "Decade of the Brain."

From the author of How Emotions Are Made, a myth-busting primer on the brain, in the tradition of Seven Brief Lessons on Physics and Astrophysics for People in a Hurry