Visual Fields

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Visual Fields

• The Visual Fields
• Visual Field Defects
• The What and Where Systems
• Visual Neglect
• Visual Agnosia

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Vision and the Cortex

• Major Anatomy

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Vision and the Cortex

• Major Anatomy - Projections from the Thalamus

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Vision and the Cortex

• Contextual Feature Detectors
• Firing rate changes with the context of the
  vertical line

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Vision and the Cortex

• Feature Detectors

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Feature Detectors Motion
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Feature Detectors Motion
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Visual Field Defects
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Visual Field Defects
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Visual Field Defects
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Visual Field Defects
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Vision and the Cortex

• Processing Streams in the Cortex

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Processing Streams in the Cortex
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Figure Memory

• Look at these pictures and try to remember them.

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Results

• Figure Memory

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Visual Neglect
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Visual Neglect
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Right Hemisphere LesionCase MH

• Neglect of the Left Side of Space
• Body Schema Disturbance w Dressing Apraxia, R-L
  Disorientation, Agnosia for Body Parts
  Anosagnosia
• Topographical Disorientation
• Defect in 2D 3D spatial perception

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MH
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MH
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Neglect in Imagination

• The Square of Milan

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Visual Neglect
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Vision and the Cortex

• Processing Streams in the Cortex

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Visual Agnosia
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Which system was fooled?
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Which system was fooled?