Mario Mendez Ashla
Narrative nonfiction in medicine, science, and the humanities
THE MIND BEHIND THE BRAIN: A NEUROLOGIST’S SEARCH FOR HUMAN NATURE
Mario F. Mendez, MD, PhD (professional name)
Professor Emeritus, Departments of Neurology and Psychiatry & BioBehavioral Sciences
David Geffen School of Medicine at UCLA
What if everything you think defines you—your values, your personality, your sense of right and wrong—could change with a single shift in the brain?
In The Mind Behind the Brain, a seasoned neurologist traces his journey from early experiences in medicine and training to a career spent probing the mysteries of the mind. Along the way, he shares gripping, real-life stories of patients whose lives were transformed by injury and disease. Through these unforgettable encounters, he reveals the science behind empathy, identity, and human behavior. Compelling and accessible, this book will change how you see yourself—and everyone around you.
Where does human nature reside—in the mind, or in the brain?
In The Mind Behind the Brain, neurologist Mario Mendez Ashla takes readers on a lifelong search for human nature—one pursued not in abstract theory, but at the bedside of patients whose brain disorders reveal what makes us who we are. In the clinic, he encounters individuals who lose empathy but retain intellect, who speak but no longer mean, who act without moral restraint. As their lives unravel, a deeper truth emerges: the most essential features of our humanity depend on the fragile workings of the brain.
Blending personal narrative, clinical insight, and philosophical reflection, Mendez traces his journey from early medical training to decades of practice and research in behavioral neurology. Through vivid patient stories, he explores how brain disease can expose the hidden architecture of the mind—its morality, identity, social connection, and sense of self.
At the heart of this inquiry is a unifying idea: the higher mental processes together constitute what we call the mind, the living expression of our human nature. This mind arises from innate neural circuits—shaped by evolution and embedded in the brain—that predispose us toward empathy, morality, curiosity, language, and belief. Before conscious thought takes hold, these deeper, preconscious processes guide our feelings, judgments, and actions, forming the foundation of who we are.
This is both a physician’s memoir and a neurologist’s search for the biological roots of human nature. Insightful, humane, and thought-provoking, The Mind Behind the Brain shows that to understand the brain is to understand ourselves.
PRAISE FOR THE MIND BEHIND THE BRAIN
“Compassionate, illuminating reflections from a wonderfully inspiring behavioral neurologist who is inviting us to think about the human condition through his professional experience with neurological patients. In this book, Mario Mendez blends neurology, neuroscience, and his own personal and intellectual growth to shed a tender light on who we are.”
—Marco Iacoboni, Neuroscientist; Author, Mirroring People
“Through engaging stories and insightful reflections, Dr. Mario Mendez shows us how morality, sociability, and other essential elements of human nature manifest in the brain.”
—Sandeep Jauhar, author of My Father’s Brain: Life in the Shadow of Alzheimer’s
“Mario Mendez, the neuropsychiatrist/neurobiologist, instead of writing another textbook, has written an exceptionally well crafted ‘neuroautobiography,’ where the story of his life runs parallel and is mixed with many philosophical questions such as ‘is the mind the brain’s expression of itself’ or whether ‘the brain reveals profound truths about human nature’ and many more, tackled with vivid human examples and a style that keeps readers glued to the pages. The book is a gem.”
—Armen H. Djenderedjian, MD, Clinical Professor of Psychiatry, Retired, Harbor–UCLA Medical Center
“A timeless, candid reflection on life filled with vulnerability and humor, from a neurobehavior specialist whose lifetime of teaching and insight has shaped our understanding of brain, behavior, and human nature.”
—Leila Parand, MD, Mary S. Easton Center for Alzheimer’s Research and Care at UCLA
“A blend of science and humanity, this book reflects Dr. Mario Mendez’s decades-long dedication to understanding the brain and mind. Drawing on his training and distinguished career in neurology, he brings readers into the lived experiences of patients with frontotemporal dementia and Alzheimer’s disease, epilepsy, stroke, and brain injury. Through vivid clinical vignettes and personal reflection, he illuminates the relationship between the brain and the mind, and between patient and clinician. Insightful, compassionate, and engaging, the book is both a testament to a remarkable career and an exploration of what it means to be human.”
—Sarah Kremen, MD, Director, Behavioral Neurology Program, Cedars-Sinai Medical Center