01:830:301 Lecture Notes - Lecture 8: Ocular Dominance, Receptive Field, Visual Cortex
Document Summary
Temporal half of retina-> ipsilateral visual cortex. Cortical magnification: 80% of cells devoted to central 10 degrees. 6 layers: input from lgn received in layer 4. They couldn"t any of the cell in v1 to fire. They knew that v1 was primary visual area and yet they cannot get these neurons to fire in response to light stimulus. Main new feature: orientation selectivity tuning curve : x axis- orientation of bar; y axis- cells responses. Respond to edges and bars of specific orientation. The edge of bar must be positioned exactly within rf. Selectivity for direction of motion: bar moving through receptive field. Binocularity: first site of binocular cells: rf layout with stimulus superimposed: strongest response- when information is received from both retina (eyes, these cells have two receptive fields, ocular dominance: slightly stronger responses to one eye. White stripes: left eye dominant: columns and hypercolumns.
