BIOLOGY 2C03 Lecture Notes - Atp Synthase, Parahippocampal Gyrus, Extrastriate Body Area

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Visual system ii ventral pathway (shape and color: introduction to the ventral pathway. The ventral pathway processes shape and color. It is composed of v1, v2, v4, (v8), and inferotemporal regions (ant. , post. , central) Fusiform face area (ffa): face stimuli or complex shape stimuli. Parahippocampal place area (ppa): landscapes and building interiors. Extrastriate body area (eba): bodies and body parts. V1 cells are tuned to the orientation of lines/edges. Simple cells: tuned to orientation, position variant. Have on/off receptive fields structured to recognize edges, perhaps as a result of convergent input of multiple lgn cells whose receptive fields are aligned. Complex cells: also tuned to orientation, but position invariant. This property may be a result of convergent input of multiple simple cells. Hypercomplex cells: added property of end-stopping (tuned to short lines) Columnar organization: each column is orientation tuned, and exact orientation shifts gradually from column to column. Color contrast is mediated by single- or double-opponent receptive fields.

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