PSYCH 345 Lecture Notes - Lecture 7: Scotoma, Indirect Pathway Of Movement, Visual Field Test
Document Summary
Small portion of visual field is represented by a large section of cognitive processes. So basically, other visual cortical pathways compensate for the lack (or damage to) of the v1 pathway. Does the same thing work in humans: given a cortically blind man, then a light is flashed in hemianopic field. Told to look at light, or give a best guess. Even though there"s no awareness of visual stimulation, patients with cortical damage to their v1 area are actually able to see the movement of light. Bypasses the v1, goes to the retino-tectal pathway (direct route for saccadic eye movement: retino-tectal: eye > superior colliculus > pulvinar > extra striate (v2) Tecto-pulvinar-extrastriate-pathway: the indirect pathway that bypasses v1: eye > superior colliculus > pulvinar > extra striate (v2) There"s still processing going on in other areas of brain: the cortical (striate/island) hypothesis:
