Lecture 8 Notes - C Parvocellular Pathway D Koniocellular...

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Lecture 8 Many photoreceptors to one ganglion cell Lateral Geniculate Nucleus of the Thalamus – very layered, 6 layers of ganglion cells with white in between, white is a different cell type, top 4 layers are parvo-cellular layers, bottom 2 are magno-cellular layers, alternate right eye left eye, magno is bigger, bigger receptive field Information from eyes goes to thalamus (thing with layers) which goes to occipital lobes through the angel wings Be able to determine what effect to vision would happen given a certain injury to the vision chain Occipital lobes responsible for opposite vision fields so: top right goes to bottom left part of occipital lobe Fobia goes to occipital pole and peripheral goes to calcarine Organization of primary visual cortex A. Large layer 4 – split into many layers B. Magnocellular Pathway ???
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Unformatted text preview: C. Parvocellular Pathway??? D. Koniocellular Pathway??? E. Ocular Dominance and Blobs in V1 1. V1 blobs organized for color F. Cell types in V1 and V2 1. Simple – sensitive to orientation 2. Complex – sensitive to orientation and motion 3. Hypercomplex or “End-stopped” – like complex but sensitive to length G. Pathways from V1 1. Ventral Pathway - Form and color (blob) to V2 pale and thin to V4 2. Dorsal Pathway – where things are or are moving in space (interblob) to thick to MT 3. Ventral – pavocellular pathway “what” 4. Dorsal – magnocellular pathway “where” H. Dorsal and Ventral Pathways 1. Color vision and V4 a. Ishihara Plates – seeing if you are colorblind, stimulate color determining parts, can no longer tell the number on the plate...
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