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Visual perception and corollary discharge.

Publication ,  Journal Article
Sommer, MA; Wurtz, RH
Published in: Perception
January 2008

Perception depends not only on sensory input but also on the state of the brain receiving that input. A classic example is perception of a stable visual world in spite of the saccadic eye movements that shift the images on the retina. A long-standing hypothesis is that the brain compensates for the disruption of visual input by using advance knowledge of the impending saccade, an internally generated corollary discharge. One possible neuronal mechanism for this compensation has been previously identified in parietal and frontal cortex of monkeys, but the origin of the necessary corollary discharge remained unknown. Here, we consider recent experiments that identified a pathway for a corollary discharge for saccades that extends from the superior colliculus in the midbrain to the frontal eye fields in the cerebral cortex with a relay in the medial dorsal nucleus of the thalamus. We first review the nature of the evidence used to identify a corollary discharge signal in the complexity of the primate brain and show its use for guiding a rapid sequence of eye movements. We then consider two experiments that show this same corollary signal may provide the input to the frontal cortex neurons that alters their activity with saccades in ways that could compensate for the displacements in the visual input produced by saccadic eye movements. The first experiment shows that the corollary discharge signal is spatially and temporally appropriate to produce the alterations in the frontal-cortex neurons. The second shows that this signal is necessary for this alteration because inactivation of the corollary reduces the compensation by frontal-cortex neurons. The identification of this relatively simple circuit specifies the organization of a corollary discharge in the primate brain for the first time and provides a specific example upon which consideration of the roles of corollary activity in other systems and for other functions can be evaluated.

Duke Scholars

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Published In

Perception

DOI

EISSN

1468-4233

ISSN

0301-0066

Publication Date

January 2008

Volume

37

Issue

3

Start / End Page

408 / 418

Related Subject Headings

  • Visual Perception
  • Visual Pathways
  • Thalamus
  • Saccades
  • Reaction Time
  • Photic Stimulation
  • Parietal Lobe
  • Neurons
  • Mediodorsal Thalamic Nucleus
  • Macaca mulatta
 

Citation

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MLA
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Sommer, M. A., & Wurtz, R. H. (2008). Visual perception and corollary discharge. Perception, 37(3), 408–418. https://doi.org/10.1068/p5873
Sommer, Marc A., and Robert H. Wurtz. “Visual perception and corollary discharge.Perception 37, no. 3 (January 2008): 408–18. https://doi.org/10.1068/p5873.
Sommer MA, Wurtz RH. Visual perception and corollary discharge. Perception. 2008 Jan;37(3):408–18.
Sommer, Marc A., and Robert H. Wurtz. “Visual perception and corollary discharge.Perception, vol. 37, no. 3, Jan. 2008, pp. 408–18. Epmc, doi:10.1068/p5873.
Sommer MA, Wurtz RH. Visual perception and corollary discharge. Perception. 2008 Jan;37(3):408–418.
Journal cover image

Published In

Perception

DOI

EISSN

1468-4233

ISSN

0301-0066

Publication Date

January 2008

Volume

37

Issue

3

Start / End Page

408 / 418

Related Subject Headings

  • Visual Perception
  • Visual Pathways
  • Thalamus
  • Saccades
  • Reaction Time
  • Photic Stimulation
  • Parietal Lobe
  • Neurons
  • Mediodorsal Thalamic Nucleus
  • Macaca mulatta