Corollary discharge circuits in the primate brain.
Abstract
Movements are necessary to engage the world, but every movement results in sensorimotor
ambiguity. Self-movements cause changes to sensory inflow as well as changes in the
positions of objects relative to motor effectors (eyes and limbs). Hence the brain
needs to monitor self-movements, and one way this is accomplished is by routing copies
of movement commands to appropriate structures. These signals, known as corollary
discharge (CD), enable compensation for sensory consequences of movement and preemptive
updating of spatial representations. Such operations occur with a speed and accuracy
that implies a reliance on prediction. Here we review recent CD studies and find that
they arrive at a shared conclusion: CD contributes to prediction for the sake of sensorimotor
harmony.
Type
Journal articleSubject
AnimalsBehavior
Behavior, Animal
Brain
Electrophysiology
Humans
Nerve Net
Primates
Vocalization, Animal
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https://hdl.handle.net/10161/11735Published Version (Please cite this version)
10.1016/j.conb.2008.09.017Publication Info
Crapse, Trinity B; & Sommer, Marc A (2008). Corollary discharge circuits in the primate brain. Curr Opin Neurobiol, 18(6). pp. 552-557. 10.1016/j.conb.2008.09.017. Retrieved from https://hdl.handle.net/10161/11735.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Show full item recordScholars@Duke
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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