KIN 155 Lecture Notes - Lecture 5: Saccade, Somatotopic Arrangement, Motion Sickness
Document Summary
Optic nerve fibres project to two main systems: geniculostriate visual system (90% of fibres, tectopulvinar visual system (10% of fibres) brain stem. Optic nerve synapses to neurons in v1 area of the occipital cortex: v1 = primary visual cortex (striate cortex) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) Vision is used for action (where) and perception (what) Some suggest that visual processing: for action involves (dorsal stream, for perception involves (ventral stream) (cid:1) Psychophysics is the quantitative study of perception, examining the relations between stimuli and response. (cid:1) Top-down (brain is on top: concept- driven- prior knowledge, expectations are critical. Bottom-up (sensory from below: data-driven sensory details are critical (cid:1) (cid:1) (cid:1) (cid:1) Depends on both top-down and bottom-up processes. Foveal (central) vision direct vision: excellent acuity, provide detailed information including colour. Peripheral vision: less acuity but plays important roles, motion detection, low light conditions, larger objects.