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The search for the human equivalent of V4 led to the discovery of other areas that were stimulated by colour. The most significant was an area anterior in the ventral occipital lobe, subsequently named V4α. Further fMRI experiments found that V4α had a different function than V4, but worked cooperatively with it. [1]
The extrastriate areas consist of visual areas 2, 3, 4, and 5 (also known as V2, V3, V4, and V5, or Brodmann area 18 and all Brodmann area 19). [ 1 ] Both hemispheres of the brain include a visual cortex; the visual cortex in the left hemisphere receives signals from the right visual field , and the visual cortex in the right hemisphere ...