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Lecture 3 notes

by: Jennifer Gittleman

Lecture 3 notes Psyc4106W

Jennifer Gittleman
Sensation and Perception
Dr. Philbeck

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Sensation and Perception
Dr. Philbeck
Class Notes
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Popular in Psychlogy

This 1 page Class Notes was uploaded by Jennifer Gittleman on Wednesday October 28, 2015. The Class Notes belongs to Psyc4106W at George Washington University taught by Dr. Philbeck in Fall 2015. Since its upload, it has received 15 views. For similar materials see Sensation and Perception in Psychlogy at George Washington University.


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Date Created: 10/28/15
Eye diagram 0000 O O O Optic nerve bundle of axons as it leaves the eye Optic chiasm xshaped structure Optic tract goes from chiasm to LGN Things that are on the right xation ends up on left side of brain and vice versa Each part of the eye has a right and left hemisphere in chiasm signals from left half of eyes go to left half in LGN If you cut the left optic nerve you can see everything from your right eye just not your left eye If you cut the left optic tract you can t see anything from left half of eye therefore can t see anything on right side of xation Receptive eld LGN O Retinotopic organization ldea that cells that are close to each other in the LGN tend to have receptive elds that are close together on the retina Once you know where cell A is on retina you know where it is near on the receptive eld 6 layers of LGN 0 Two main types of LGN cells Magnocellular Large cell bodies Respond to brief bursts of ring Synapse in layers 1 and 2 0 Movement Parvocellular Small cell bodies Respond to sustained ring Synapse in layers 34 5 and 6 0 Color texture shape depth Simple Cell Receptive Field Hubel and Wiesel O 0 Response to edge or bar of light In primary visual cortex Endstopped cell responses 0 Prefers lines of a certain length 0 As you increase white part it turns the cell off if you make the bar too long it stops the cell ring


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