Afterimage of perceptually filled-in surface

Science. 2001 Aug 31;293(5535):1677-80. doi: 10.1126/science.1060161.

Abstract

An afterimage induced by prior adaptation to a visual stimulus is believed to be due to bleaching of photochemical pigments or neural adaptation in the retina. We report a type of afterimage that appears to require cortical adaptation. Fixating a neon-color spreading configuration led not only to negative afterimages corresponding to the inducers (local afterimages), but also to one corresponding to the perceptually filled-in surface during adaptation (global afterimage). These afterimages were mutually exclusive, undergoing monocular rivalry. The strength of the global afterimage correlated to a greater extent with perceptual filling-in during adaptation than with the strength of the local afterimages. Thus, global afterimages are not merely by-products of local afterimages, but involve adaptation at a cortical representation of surface.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptation, Ocular
  • Adaptation, Physiological
  • Afterimage*
  • Humans
  • Illusions
  • Neurons / physiology
  • Photic Stimulation
  • Retina / physiology
  • Visual Cortex / physiology*
  • Visual Pathways / physiology*