Visual Agnosia Summary

• "Percepts" undergo many transformations so recognition deficits are variable.

• Apperceptive agnosia - early deficit, affecting all visual materials (objects, faces, words).

  • impaired copy and matching
  • Deficit in shape coding stage

• Integrative Agnosia

  • can be material-specific (word or face processing may be spared)
  • copying is slavish and labored
  • deficit in figure/ground segregation, grouping

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