PSYC 2390 Lecture : March20.rtf
16 Apr 2012
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Document Summary
Cells in the mtc that respond to a larger percentage of movement. Induced motion illusion: tendency for vision to assume that the small thing moves. Tendency to underestimate how quickly larger things are moving, this gets people killed every year in railway crossings. Train is a large thing, visual system is inclined to underestimate the speed of large things. Distinguishing real movement from motion that is produced by voluntary eye movements. Caused from motor system sending systems for your eye to move. Corrolary discharge theory: motor cortex tells our muscles to move, sends two signals: motor, sensory. 1. it sends movement, 2. when this happens it also sends a corollary information down to the eye muscles for signal (copy) to the comparator (part of the brain that makes comparisons). The retina also sends information about image movement to the comparator. Comparator takes into account both of these things when it makes judgement about movement (corollary signal, sensory image movement signal)
