Our research is aimed at understanding the neural mechanisms that support learning and memory.  Using neurophysiological techniques, we record simultaneously from multiple electrodes in the hippocampus and surrounding cortex in awake, behaving monkeys.  We investigate how changes in neuronal activity correlate with the monkey's ability to learn and remember. We are particularly interested in the activity of neuronal networks that underlie learning and memory processes.  We use spectral analysis techniques to investigate the role of oscillatory activity and neuronal synchronization in cognition.