4_28_09_MinimalWiring

4_28_09_MinimalWiring - Outline of the Lecture...

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Outline of the Lecture Outline of the Lecture Minimal-wiring Hypothesis Minimal-wiring Hypothesis Dimensionality Reduction         Elastic Nets          Development Dimensionality Reduction         Elastic Nets          Development      
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The Function of Cortical  The Function of Cortical  Maps May Be to  Maps May Be to  Minimize Wiring Minimize Wiring    
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Ocular- dominance columns develop slowly after birth, as this autoradio- graphs from the developing kitten cortex shows.
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This model develops quasi-periodic columns, with variations due to random initial conditions.
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Optical imaging (9 × 12 mm) shows that the cortex represents orientation selectivity in orderly, pinwheel- like maps of columns of cells.
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In a model of cortical develop- ment, the input- correlation matrix emerges from interactions between cells in the LGN.
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When one superimposes different cortical maps, interesting relationships arise.
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Does the lawful organization of multiple cortical maps follow a computational rationale?
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Hypothesis: The multi-dimensional visual space projects to a two-dimensional cortex… … such that features that need to be together are together.
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In other words, how do we lay multiple maps onto a 2D cortex in a sensible way?
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This note was uploaded on 06/08/2009 for the course BME 575L taught by Professor Grzywacz during the Spring '09 term at USC.

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4_28_09_MinimalWiring - Outline of the Lecture...

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