A pathway in primate brain for internal monitoring of movements.
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It is essential to keep track of the movements we make, and one way to do that is to monitor correlates, or corollary discharges, of neuronal movement commands. We hypothesized that a previously identified pathway from brainstem to frontal cortex might carry corollary discharge signals. We found that neuronal activity in this pathway encodes upcoming eye movements and that inactivating the pathway impairs sequential eye movements consistent with loss of corollary discharge without affecting single eye movements. These results identify a pathway in the brain of the primate Macaca mulatta that conveys corollary discharge signals.
Mediodorsal Thalamic Nucleus
Published Version (Please cite this version)10.1126/science.1069590
Publication InfoSommer, Marc A; & Wurtz, Robert H (2002). A pathway in primate brain for internal monitoring of movements. Science, 296(5572). pp. 1480-1482. 10.1126/science.1069590. Retrieved from https://hdl.handle.net/10161/11748.
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Marc A. Sommer
Associate Professor of Biomedical Engineering
We study circuits for cognition. Using a combination of neurophysiology and biomedical engineering, we focus on the interaction between brain areas during visual perception, decision-making, and motor planning. Specific projects include the role of frontal cortex in metacognition, the role of cerebellar-frontal circuits in action timing, the neural basis of "good enough" decision-making (satisficing), and the neural mechanisms of transcranial magnetic stimulation (TMS).
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