PSYC 212 Lecture Notes - Lecture 9: Parahippocampal Gyrus, Ocular Dominance Column, Retinal Ganglion Cell

• School: McGill University
• Department: Psychology
• Course: PSYC 212
• Professor: Mathieu Roy

Document Summary

Orientation is created from combining activity from several ganglion cells. Cells in v1 recombine activity from several ganglion cells to perceive lines eg. white on black, or black on white lines. Two types of columns ocular dominance column or orientation columns. Orientation columns: smaller columns where neurons respond to specific orientations and lines eg. 45 degree angle lines. Combining the two types of columns creates a hypercolumn; has input from both eyes and all possible orientations. The hypercolumn is a 1mm block of the striate cortex, but has all the machinery necessary to look after everything the visual cortex is responsible for. Even in v1, the input coming from the parvocellular cells from the fovea and the magnocellular cells from the periphery are still segregated in the different layers. They are still segregated at v1 at the level of these layers.