PSY 368 Lecture Notes - Lecture 7: Psy, Retina, Fusiform Face Area
28 Mar 2019
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Document Summary
Tuned for orientation, direction of motion, and now the size (e. g. width or length) or shape (e. g. a corner with a particular angle) of a stimulus. Rfs are larger than those found in complex cells. A cell responds best to a bar of a particular length; a shorter or longer bar results in a weaker response. A cell might also respond best to a stimulus of a particular width; a wider or thinner bar results in a weaker response. Other cells prefer patterns having particular angles. The farther away you look from the initial projection area (ivc), the increasingly specialized neurons become complex patterns. Cortical magnification - a relatively big area of v1 (~10%) is devoted to analyzing info from the relatively small (. 01%) foveal region of the retina. Each ganglion cell is allotted roughly the same amount of space (number of cells) in v1. Dense distribution of cones and ganglion cells in the fovea, sparse distribution in the periphery.
