I am a Professor of Neurobiology and Behavior. My training was at Stanford University (A.B., Ph.D. in Genetics, Postdoctoral Fellowship in Neurochemistry) and Harvard University (Postdoctoral Fellowship in Neurophysiology). I have been at Cornell since 1980. My major research interests are in the mechanisms underlying the generation of flexibility in behavior. We focus on simple model systems to understand how neurotransmitters can reconfigure anatomically defined behavioral neural networks to provide flexibility in rhythmic behaviors. We are now beginning to study the neural networks for locomotion in the spinal cord, and the changes that spinal cord injury causes in those networks.