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Vision and the Brain: Unseen Complexities Part 1

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Uploaded on Apr 29, 2009

Why do we need vision? As it turns out, there are two answers to this question. On the one hand, we need vision to give us detailed knowledge of the world beyond ourselves, knowledge that allows us to recognize things from minute to minute and day to day. On the other hand, we also need vision to guide our actions in that world at the very moment they occur. These are two quite different job descriptions, and nature seems to have given us two different visual systems to carry them out. Dr. Murray explores the problems in the context of object size and brightness perception, and discusses computational challenges in sight that require extensive neural processing.

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