Peggy Mason, PhD is a Professor in the Department of Neurobiology at the University of Chicago.
After a 25-year focus on the cellular mechanisms of pain modulation (how does morphine work? and related questions), my laboratory has begun to concentrate on the biological basis of empathy. While my interest in pain modulation endures, primarily through collaborative work, the bulk of the current work in the laboratory is focused on empathic helping. Additional interests are the development of feeding patterns during early life and the biology of vasomotor disorders (hot flashes, night sweats).
More info: http://neurobiology.uchicago.edu/page/mason