NROC64H3 Study Guide - Motion Perception, Parietal Lobe, Peripheral Vision
Document Summary
The primary visual field (also known as striate cortex or v1): Is located in the occipital lobe of the primate brain. Much of area 17 lies on the medial surface of the hemisphere, surrounding the calcarine fissure. Retinotopy: is an organization whereby neighboring cells in the retina feed information to neighboring places in their target structures- in this case, the lgn and striate cortex. In this way the two-dimensional surface of the retina is mapped onto the two-dimensional surface of the subsequent structures. The mapping of the visual field onto a retinotopically organized structure is often distorted, because visual space is not sampled uniformly by the cells in the retina. *** recall: there are many more ganglion cells with receptive fields in or near the fovea than in the periphery. Thus, the representation of the visual field is distorted in striate cortex: the central few degrees of the visual field are overrepresented or magnified, in the retinotopic map.
