Contrast adaptation in striate cortex of macaque

Vision Res. 1989;29(7):747-55. doi: 10.1016/0042-6989(89)90087-4.


We have characterized the contrast-response relationships for simple and complex cells in striate cortex of macaque monkey, before and during adaptation to high-contrast sinusoidal gratings of the optimal spatial-frequency and orientation. Adaptation brings about systematic changes in the steepness of contrast-response curves and in the effective contrast of stimuli. Adaptation reduces the detectability of low-contrast gratings by almost a factor of three, but by extending the operating range of most cells it appears to improve the discriminability of high-contrast stimuli that previously gave rise to responses of saturating amplitude.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adaptation, Ocular / physiology*
  • Animals
  • Contrast Sensitivity / physiology*
  • Macaca fascicularis
  • Neurons / physiology
  • Pattern Recognition, Visual
  • Visual Cortex / cytology
  • Visual Cortex / physiology*
  • Visual Perception / physiology