PHYSL405 Lecture Notes - Lecture 9: Ocular Dominance Column, Receptive Field, Cortical Column
7 Nov 2016
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Functional cortical column (2mm x 2mm x 2mm) Have all the orientation preferences (not scaled); just understand that we have many ingredients and slowly mixing them. Blobs (recall: koniocellular layer does not mix and goes directly to layer 2/3, so is center surround) Moving slits of light also excite these cells, but there is no preferred orientation to slits of light. Respond best to moving lines of particular orientation at optimum speed. If have 3 receptive fields, will mingle at the bottom (layer. 4/ca) = minor exception b/c is not just center surround but is a bit of integration here: is ready for orientation detection. How we take center surround cells and take many of them and project respective info on one cell (usually layer 2/3, with some exceptions in layer 4) making new cell. I = intralaminar (can be replaced with k = koniocellular) Has been traced with parvocellular straight to layer 1 = exception.
