TALES FROM BOTH SIDES OF THE BRAIN

“How on earth does the brain enable mind?” That is the still-to-be-answered question posed by Gazzaniga (Who's in Charge: Free Will and the Science of the Brain, 2011, etc.), the director of the SAGE Center for the Study of Mind at the University of California, Santa Barbara.

In this scientific memoir, the author chronicles his 50-year career at the forefront of research and “the scientific saga” in which he still plays a part. “I have come to realize the great extent to which my own march through life has been influenced by others,” he writes, “…and how we scientists are all a composite of both scientific and nonscientific experiences.” His own scientific journey began as a graduate student at Caltech, where the hot topic was “split brain research [on animals] which was trying to find out if each hemisphere of the brain could learn independently from the other.” His focus became the study of epileptic patients who underwent similar surgery to control intractable seizures, and he describes his stunning realization that his first human subject's “right brain completed an act of which his own left hemisphere had no knowledge.” In effect, two separate minds were functioning in the same body. Though they could not communicate directly, over time, they developed indirect ways of cueing each other. Gazzaniga describes how this discovery paved the way for understanding how normal brains use modular processes that work in parallel to process information and come to decisions. The author writes warmly of the people who shared in his discoveries and his many friendships. In a foreword, Steven Pinker pays tribute to Gazzaniga not only for his scientific achievements, “midwifing the field of cognitive neuroscience, but…for showing that science is compatible with all the other good things in life.”

A lively appreciation of both the complexity of the human mind and the scientific enterprise.