Corollary discharge circuits in the primate brain
Open accessAbstract
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.
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The mechanistic basis of N1-suppression to overt speech involves an efference-copy mediated IFM.
“There is strong evidence that the mechanistic basis of N1-suppression to overt speech involves an efference-copy mediated IFM (Eliades and Wang, 2003; Crapse and Sommer, 2008; Rauschecker and Scott, 2009).”
From Neurophysiological evidence of efference copies to inner speech (2017) · cites this paper as Crapse and Sommer, 2008
The “CD and human behavior” section links corollary-discharge mechanisms in speech production to dampening of the human auditory N100 during self-vocalization. The “CD and mechanism” section describes suppression when vocal feedback matches predictions, but its evidence concerns marmoset neurons. The paper describes a forward model explicitly for eye movements, not as an established mechanistic basis for speech-related N1 suppression. (LLM, conf=0.86)
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- Authors
- Crapse, T. B., & Sommer, M. A.
- Affiliations
- University of Pittsburgh (US)
- Corresponding author
- Crapse, Trinity B
- Sommer, Marc A
- ORCID
- Sommer, Marc A
- Venue
- Current Opinion in Neurobiology
- Publisher
- Elsevier BV
- Published
- 2008-12
- Volume
- 18
- Issue
- 6
- Pages
- 552-557
- ISSN
- 0959-4388 (ISSN-L)
- PMC
- PMC2702467
- OpenAlex
- W2086874661
- Cited by
- 147
- References
- 7
- Citations by year
- 2026: 4 · 2025: 10 · 2024: 9 · 2023: 5 · 2022: 4 · 2021: 26 · 2020: 7 · 2019: 9 · 2018: 7 · 2017: 7 · 2016: 5 · 2015: 10 · 2014: 10 · 2013: 14 · 2012: 9
- FWCI
- 0.25
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Current Opinion in Neurobiology (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- DukeSpace (Duke University) (submittedVersion, cc-by-nc-nd)
- Funders
- National Institutes of Health (EY017592)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
- Life Sciences › Neuroscience › Cognitive Neuroscience › Embodied and Extended Cognition
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Multisensory perception and integration
- Keywords
- corollary discharge, sensorimotor prediction, motion monitoring, primate brain
- MeSH terms
- Animals, Behavior, Behavior, Animal, Brain, Electrophysiology, Humans, Nerve Net, Primates, Vocalization, Animal
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