Ralph Siegel (scientist)

Dr. Ralph Mitchell Siegel, a researcher who studied the neurological underpinnings of vision, was a professor of neuroscience at Rutgers University, Newark, in the Center for Molecular and Behavioral Neuroscience. He died September 2, 2011 at his home following a long illness.

Siegel, a neurophysiologist, was interested in the basic mechanisms underlying visual motion and spatial perception, with the ultimate goal of developing applications to assist people who have visual processing disorders and neurological injuries. He performed pioneering work on parietal neurons and the influence of eye position and attention on perception. His laboratory became the first to perform optical imaging of parietal cortex in behaving non-human primates.

Biography

Siegel earned his B.S. in physics and his Ph.D. in physiology from McGill University in Montreal. After completing his graduate studies at McGill on theoretical neuroscience of spiking behaviour in neural dendrites, Ralph moved to the Salk Institute where he began to focus on in vivo, behavioral neurophysiology of monkeys. Ralph was at the forefront of experimental studies to understand the neurophysiology of cognitive processes in primates in the early 1980s. He was a co-discoverer of the gain-field mechanisms of neuronal population encoding, and employed precise psychophysical methods to understand visual motion perception at the level of neuronal activity.