Vertical binocular disparity is encoded implicitly within a model neuronal population tuned to horizontal disparity and orientation.

ABSTRACT: Primary visual cortex is often viewed as a "cyclopean retina", performing the initial encoding of binocular disparities between left and right images. Because the eyes are set apart horizontally in the head, binocular disparities are predominantly horizontal. Yet, especially in the visual periphery, a range of non-zero vertical disparities do occur and can influence perception. It has therefore been assumed that primary visual cortex must contain neurons tuned to a range of vertical disparities. Here, I show that this is not necessarily the case. Many disparity-selective neurons are most sensitive to changes in disparity orthogonal to their preferred orientation. That is, the disparity tuning surfaces, mapping their response to different two-dimensional (2D) disparities, are elongated alon

SUBMITTER: Read JC 

PROVIDER: S-EPMC2858673 | biostudies-literature | 2010 Apr

REPOSITORIES: biostudies-literature