S&P 070226 - PROPERTIES OF V1 CELLS 1. ORIENTATION...

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PROPERTIES OF V1 CELLS 1. ORIENTATION SELECTIVITY Orientation Tuning Curve tells which particular orientation any given neuron is “tuned to”. Simple Cells that respond to edges and bars of specific orientations. o Elongated RF’s with clearly demarcated ON and OFF regions. o The edge or bar must be positioned exactly within RF o Simple relationship b/w RF and preferred stimulus Line Bar RF – L RF – B Complex Cells are like simple cells, but: o Do not have clearly demarcated receptive fields o The edge or bar does not need to be positioned precisely within the field, but certain orientation is nonetheless preferred o More difficult to predict which stimulus based on RF position Hypercomplex Cells (End-Stopped Cells) respond both to specific orientations, as well as specific bar lengths. Both simple and complex cells appear in this subtype. o Sensitive to sharp corners and points of high curvature Clusters of cells prefer vertical and clusters prefer horizontal
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This note was uploaded on 04/05/2008 for the course PSYCH 301 taught by Professor Singh,m. during the Spring '07 term at Rutgers.

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S&P 070226 - PROPERTIES OF V1 CELLS 1. ORIENTATION...

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