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Optic Nerves, Neurons, and Shape Perception - Prof. Douglas N. Ishii, Study notes of Biology

Colorado State University (CSU)Biology

Prof. Douglas N. Ishii

The optic nerves' crossing point in the optic chiasm, the path of information to the visual cortex, and the roles of on-center and off-center bipolar neurons in shape perception. It also explains how the brain perceives contrast and the importance of using neuronal connections.

Typology: Study notes

2011/2012

Uploaded on 04/12/2012

mardiguian26149 🇺🇸

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Download Optic Nerves, Neurons, and Shape Perception - Prof. Douglas N. Ishii and more Study notes Biology in PDF only on Docsity! 6 February Figure 7.29 Optic nerves cross in optic chiasm Information travels to visual cortex Information from the right half of both eyes goes to the right lateral geniculus and to the right visual cortex So information from right half of left eyes crosses over in optic chiasm Convergence leads to depth perception On-center bipolar neuron Best stimulus: small spot of light on center Depolarization – light on center Hyperpolarization – annular light Annular light is on edges of receptor field Off-center bipolar neuron Best stimulus: annular light Depolarization – annular light Hyperpolarization – light on center Shape Perception Off-center bipolar cells detect edges Depolarize → fire

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