Visual form perception is a function of the visual cortex: II. The rotated horizontal-vertical and oblique-stripes pattern problems

Abstract

Rats prepared with serial visual-cortical ablations and interoperative relearning easily relearn a mirror-image problem presented by the rotation of horizontal-vertical stimuli by 45 deg (turning it into an oblique-stripes problem on diamond-shaped doors), although the problem was initially very difficult to learn. Similarly treated rats trained on an obliquestripes problem that has also been rotated by 45 deg (turning it into a horizontal-vertical stripes problem on diamond-shaped doors) cannot relearn the problem although originally they had learned the problem very easily. The results are discussed in terms of the orientation and local flux-contour cues that exist in the horizontal-vertical and oblique-stripes pattern problems as well as in other tests of visual pattern and form perception. It is concluded that visual form perception is a function of the visual cortex.