ANAT 321 Lecture Notes - Lecture 19: Visual Cortex, Receptive Field, Color Vision
22 Oct 2016
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Document Summary
The visual cortex is actually quite large in humans and primates, and the layers are divided into sublayers: 4a, b, c. The m, p and k pathways are integrated in different layers of v1: outputs from v1 form separate dorsal (where) and ventral (what) channels. One of them project out of the primary visual cortex towards higher-order regions of the visual cortex. The dorsal where stream: an anatomically distinct pathway specifically involved in detecting objects in space and their movements, they also project to the blobs and interblobs also contribute to the colour/form pathway. Anatomically, blobs are vertical, cylindrical pegs of neurons. The neurons in 4cbeta also project to regions between the blobs, called interblobs: the neurons in the blobs/interblobs project separate streams that runs along the ventral surface of the brain. The what stream ability to visualize and recognize objects: k pathway, starts with the bistratified cells, these projections actually bypass layer 4 and go directly to the blobs.
