Perception & Psychophysics

, Volume 34, Issue 4, pp 371–380

Role of corollary discharge in space constancy

  • Lawrence Stark
  • Bruce Bridgeman
Article

DOI: 10.3758/BF03203050

Cite this article as:
Stark, L. & Bridgeman, B. Perception & Psychophysics (1983) 34: 371. doi:10.3758/BF03203050
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Abstract

Visual fixation can be maintained in spite of finger pressure on the monocularly viewing eye. We measured the amount of extraocular muscle effort required to counter the eyepress as the secondary deviation of the occluded fellow eye. Using this method, without drugs or neurological lesions, we have shown that corollary discharge (CD) governs perception of position of a luminous point in darkness, that is, an unstructured visual field. CD also controls visuomotor coordination measured with open-loop pointing and the matching of visual and auditory direction in light and in darkness. The incorrectly biased CD is superseded byvisual position perception in normal structured environments, a phenomenon we call visual capture of Matin. When the structured visual field is extinguished, leaving only a luminous point, gradual release from visual capture and return to the biased CD direction follows after a delay of about 5 sec.

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Copyright information

© Psychonomic Society, Inc 1983

Authors and Affiliations

  • Lawrence Stark
    • 1
    • 2
  • Bruce Bridgeman
    • 1
    • 2
  1. 1.Department of Engineering Science and NeurologyUniversity of CaliforniaBerkeley
  2. 2.Department of Physiological OpticsUniversity of CaliforniaBerkeley