KINE 3020 Lecture Notes - Lecture 5: Cornea, Optic Nerve, Visual Cortex
8 Feb 2016
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How it is used to control skilled movement: using the vision for coordinating the motor movements / actions. Need the oculomotor system to bring a target into focus on fovea: core: cones color, peripheral: rods monotone. Pick up the information by moving the eye very quickly (2~3 times per sec) Optic tract: axon (white fiber, optic nerve & optic tract are the same. From visual cortex, info goes to different places. 2 parallel pathways = 2 visual streams: anatomically distinct streams. Retina sc (superior colliculus; pretectal area) ppc. Dorsal stream: where & how, posterior parietal (ppc; proprioception & vision, you don"t have to recognize what it is. E. g. blocking something coming toward my eyes. Act on it before recognize what it is: immediate action. Memory < 2 sec don"t remember what it is. Concerned with selecting action to particular spatial locations: viewer-centered, unconscious. Ventral stream: what, temporal lobe, memory based, object-centered, conscious perception & recognition of objects.
