Fig. 1.

Topography of visual areas. (Left) Layout of the visual field. (Right) Representation of the visual field in the right cerebral hemisphere. The representation of visual space in primary visual cortex (V1) is noncontiguous along the vertical meridian as a consequence of the separation between the two hemispheres. Areas V2 and V3 are further divided along the horizontal meridian, resulting in a quadratic representation of the visual space. LVF, UVF, Left VF, and Right VF indicate the lower, upper, left, and right visual fields, respectively.