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Unformatted text preview: multiple receptors, ganglion cells from multiple bipolar cells Receptive field of a neuron Challenge : still needs to represent location/intensity of activation Receptive fields Numerous (and overlapping) receptive fields help map precise information seen in the environment! How do we process color? Trichromatic theory Pattern across cones yields unique colors Color opponent theory Some colors work against others Red/green, blue/yellow Explains image after effects Information leaves the eye Visual fields Each eye, half a visual field Optic chiasm Nasal fields cross Visual field, side of brain Synapse on thalamus How does the eye process light? Synapse on occipital lobe Primary visual cortex (V1) Single neurons in V1 code for features! As processing in brain advances, neurons represent more complicated features! Two streams of processing What does the brain want to know? What is out there? (Ventral, temporal lobe) Where is it? (Dorsal, parietal lobe)...
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- Spring '04