PSYC 215 Lecture 3: Lecture 3
14 Mar 2018
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Document Summary
Visual info goes into the eye ( retina) down fibers called optic nerve to optic chiasm down optic tracts to lgn (lateral geniculate nucleus) to optic radiations (v1) The cortical surface has a map of the sensory surface (i. e. , the retina) More peripheral blindness closer to front of head. Simple cell - discovered by hubel and wiesel (1965) Electrode in primary visual cortex -- find this cell. A simple cell in the primary visual cortex is a cell that responds primarily to oriented edges and gratings in specific places in visual field. Orientation selectivity of simple cells in cat v1 layer 4 is shaped by an oriented arrangement of input from cells in the lateral geniculate nucleus (lgn) that are not tuned for orientation. Complex cell line must be moving in specific orientation and direction in specific receptive field. Kind of combines the two simple cell selectivities. Tuning of that neuron- what it really likes.
