Lec 12 - Higher Visual Processes and Plasticity - Begin Auditory - 24 Oct 08

Lec 12 - Higher Visual Processes and Plasticity - Begin Auditory - 24 Oct 08

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Lecture 12: Higher Visual Processing Pt 3; Visual Plasticity; Intro to Auditory System A. Khan, 24 Oct 08
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The Primary Visual Pathway 1 3 2 4 5 6 primary visual cortex Brodmann area 17
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Inferior Field Superior Field Peripheral Visuotopic organization of the primary visual cortex Central
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Laminar organization of the primary visual cortex
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V1 neurons respond selectively to stimulus orientation
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Hypercolumn, region that represents one point in visual space (receptive fields are overlapping) and in which a given stimulus attribute e.g. Orientation is analyzed for all permutations. Orientation Column, vertically aligned cells across the cortical depth (the different layers) share the same preference for stimulus orientation. V1 neurons respond selectively to stimulus orientation
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1 o of visual space Hypercolumn (~1 mm 2 of cortex) representing 1 o of visual space. The color of the bars indicate the orientation column that is activated by the corresponding bar at left.
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Mixing of the pathways from the two eyes first occurs in V1
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Mixing of the pathways from the two eyes first occurs in V1 Ocular Dominance Columns
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Beyond V1 – “Extrastriate” Cortex
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This note was uploaded on 11/02/2008 for the course BISC 421 taught by Professor Hirsch,liman,quick during the Fall '08 term at USC.

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Lec 12 - Higher Visual Processes and Plasticity - Begin Auditory - 24 Oct 08

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