PSYC 2P49 Lecture Notes - Lecture 9: Correspondence Problem, Motion Perception, Two-Streams Hypothesis
14 Dec 2016
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Document Summary
Many cells respond when a line moves in a. Have motion detectors for all directions (and speeds) Every cell has an aperture! (receptive eld) Correspondence and aperture problem are partly resolved through global motion information. Occurs primarily in area mt (middle temporal) part of the dorsal stream. Lesions to this area affect ability to detect ambiguous motion another example of feedback processing. Within an aperture (a window), motion direction can be ambiguous. Get a bigger aperture integrate motion signals/ feedback information. Activity arrives at the motion cells at two different times. A small neural circuit that enables motion perception. Will only re to a moving stimulus. Won"t re when objects moving in opposite direction. Will only re when mo*on occurs at the correct speed. Motion and attention are both associated with eye movements. Attention: tends to follow eye-movements (not always) Motion: eye movements create movement across the retina.
