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Psych115_Week8_Vision

Psych115_Week8_Vision - Cortical Plasticity and the...

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Click to edit Master subtitle style 6/13/11 Cortical Plasticity and the Critical Period in the Primary Visual Cortex Psych 115 Spring 2011 Week 7 Discussion
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6/13/11 Visual System Retina contains may neurons that process visual input: - Photoreceptors - Bipolar cells - Ganglion cells Projections from the retina go to the lateral geniculate nucleus (LGN) Projections from the LGN then synapse to neurons in the primary visual cortex, or V1
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6/13/11 Primary Visual Cortex (V1) l V1 neurons are receptive to? Bars of light Bars of specific orientation Specific location of bars l How are V1 neurons organized? Retinotopic map Orientation =
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6/13/11 Ocular Dominance Columns
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6/13/11 Ocular dominance
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6/13/11 Ocular Dominance l During gestation: Monocular synapses are made l Experience prunes synapses l Hebbian synapses: “Cells that fire together, wire together” Donald Hebb
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6/13/11 Ocular Dominance l Ocular dominance is experience dependent Input of the left and right eye compete to gain dominance of the columns l But what would happen if there was no competition???
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