Unformatted text preview: antagonism – two types of cells, each with agonizing/antagonizing color field) • (1)Red/Green; (2)Blue/Yellow • Parvo cells are more acute, with better resolution than mango cells, because their receptive fields are smaller • Magno cells respond better to movement Visual Cortex Primary Visual Cortex (PVC) – area of visual cortex that receives its inputs directly from the LGN. Also known as “V1” (first visual area), “striate cortex” (surface has striations), and “area 17” (based on older nomenclature) • Retinotopic Map in V1 • Cortical Magnification – 80% of cells devoted to central 10 degrees of vision. Each hemisphere represents contralateral visual field • 6 layers o Input from LGN enters via Layer 4 • Hubel & Wiesel – prior to their work, people had already figured out how ganglion d LGN cells respond to light using flashing spots of light • V1 cells are orientation-selective Superior Colliculis...
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- Spring '07