Central neural mechanisms for detecting second-order motion

Curr Opin Neurobiol. 1999 Aug;9(4):461-6. doi: 10.1016/S0959-4388(99)80069-5.


Single-unit neurophysiology and human psychophysics have begun to reveal distinct neural mechanisms for processing visual stimuli defined by differences in contrast or texture (second-order motion) rather than by luminance (first-order motion). This processing begins in early visual cortical areas, with subsequent extrastriate specialization, and may provide a basis for form-cue invariant analyses of image structure, such as figure-ground segregation and detection of illusory contours.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Animals
  • Contrast Sensitivity / physiology*
  • Humans
  • Motion Perception / physiology*
  • Photic Stimulation
  • Signal Transduction / physiology*
  • Visual Cortex / physiology*