- Receptive Fields Review
- LGN
- The cell bodies in layers 1&2 are larger than the cell bodies in layers 3-6
- 1&2 get their information from rods
- Layers 3-6 get a lot of their information from cones
- Retinotopic Map
- receptive fields for cell 1 and cell 2 will be right next to each other and you can build an entire map of the retina on the LGN layers (or something like that. It's a little confusing)
- Adjacent cells on the retina line up with adjacent cells on the LGN
- Optic Radiations
- Primary Visual Cortex (Area VI) (Occasionally called area 17, or striate cortex)
- First cortical area for visual processing
- 6 Layered structure
- Organization
- Retinotopic Map
- Orientation Columns
- Cortical Magnification
- Color blobs
- Ocular Dominance Columns
- VI Receptive Field Properties
- Simple cortical cells: respond best to bar of light oriented along the length of the receptive field (LGN)
- Complex Cortical Cells
- End-stopped: bar must not exceed a given length for maximum response
- Motion sensitive: bar must move in a particular direction for max response
- Many other types...
- Lines and Edges
- Edges are super important... yep
Monday, February 6, 2012
370: From the Eye to the Brain Pt2, Primary Visual Cortex Pt1
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