Office Location: 097 Physics
Office Phone: 919-660-2548
Email Address: hsg@phy.duke.edu
Web Page: http://www.phy.duke.edu/~hsg/
Specialties:
Biological physics
Nonlinear dynamics and complex systems
Education:
PhD, Princeton, 1981
MS, Princeton, 1978
BA, Harvard University, 1974
Research Categories: Theoretical Neuroscience
Current projects: Origin of sparse high-frequency precisely aligned bursts in neurons of the songbird nucleus HVC., How bursts propagate through synfire chains in the presence of noise and in the presence of external signals representing auditory input.
Research Description: After working in nonlinear dynamics and nonequilibrium pattern formation for many years, my research group has begun studying problems in theoretical neurobiology in close collaboration with Professor Richard Mooney's experimental group on birdsong at Duke University. The main scientific question we are interested in is how songbirds learn to sing their song, which is a leading experimental paradigm for the broader neurobiology question of how animals learn behaviors that involve sequences of time. My group is interested in problems arising at the cellular and network levels (as opposed to behavioral levels). One example is understanding the origin, mechanism, and eventually the purpose of highly sparse high-frequency bursts of spikes that are observed in the nucleus HVC of songbird brains (this is the first place where auditory information seems to be combined with motor information). A second example is to understand how auditory and motor information are combined, e.g., there are data that suggests that the same group of neurons that instruct the respiratory and syringeal muscles to produce song (again in nucleus HVC) are also involved in recognizing song. My group is trying to understand how bursts similar to those observed experimentally propagate through abstract models called synfire chains, but in the presence of noise and in the presence of external signals representing auditory input to nucleus HVC.
Recent Publications (More Publications)