Donald PfaffDonald Pfaff is Professor of Neurobiology and Behavior at the Rockefeller University, New York. With over fifty years of experience in the field, he has authored or edited more than thirty books and is active on six journal editorial boards in topicsof neuroscience. His study of generalized arousal led to the first operational definition of the term, enabling scientists to measure arousal quantitatively in laboratory animals and humans. Read More Read Less