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lect0420 - Cogs 160 Neural Coding in Sensory Systems Cogs...

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Cogs 160: Neural Coding in Sensory Systems Cogs 272: Computational Models of Sensory Coding Prof. Angela Yu Department of Cognitive Science April 20, 2010
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Week 3: Writing Assignment Answer one of the following questions based on this week's material (one-page typewritten response, double-spaced, due Friday 04/23/10). Summarize behavioral and neurophysiological evidence that supports the hypothesis that attention modulates sensory processing by selectively altering effective stimulus contrast. The effects on V4 neural response of attending to a target instead of a distractor outside the receptive field (RF), compared to attending to a target when both target and distractor are inside the neuron's RF, are different. Describe this difference. What is surround inhibition? Is the suppressive effect of a surround stimulus strongest or weakest when it is of the neuron's preferred orientation? How is this similar or different from the contrast- dependent interactions when both stimuli appear within the classical receptive field?
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