Harvey Grill and lab members have shown that leptin, a hormone made in fat, acts on the the same neurons in the brain that respond to signals arising from food in the stomach. Immunohistochemical images of **green** pSTAT leptin responsive cells, **red** c-Fos stomach distension responsive cells and yellow neurons responsive to both signals
Psychology is the science of mind, brain, and behavior. The Department of Psychology at the University of Pennsylvania is the oldest continuously functioning psychology department in North America and has a rich history. Consistently ranked among the top Psychology Departments in the world, its graduate program has produced a disproportionate number of today's leading psychological scientists (see list). Today, the department's faculty apply rigorous methods to answer questions in a wide range of overlapping research areas.
