BIO SCI 35 Study Guide - Midterm Guide: Receptive Field, Retinal Ganglion Cell, Stephen Kuffler

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BIO SCI 35 Full Course Notes
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BIO SCI 35 Full Course Notes
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Drawings are illusions but our brains make it easy to recognize. Hard to understand our perception of illusions scientifically. Retina takes light and turns it into signals. If you stick a metal electrode in eyeball and push it to the retina - you can record electrical activity (stephen kuffler) There is electrical activity in these cells even when there is light - firing in neurons without anything going on. Center-surround antagonism of light responses in retinal output neurons. Light in one spot (center) will drive action potential activity. Spot in surround of center (suppresses activity of cell in center) If whole field was illuminated, no change in firing. Why at the intersection points, things appear dimmer. More darkness in surroundings - more firing of neurons = more suppressive. In the somatosensory system - the amount of representation in certain parts of our body are more than other parts. Early experiences sculpt the juvenile brain during defined critical periods.

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