Lecture 13: Review Flashcards

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1
Q

What happens if you lesion the left inferior frontal gyrus?

A
  • Disconnection from the right motor region
    • right hemiplegia
    • Broca’s aphasia
    • can’t carry out verbal commands with the intact left hand
    • sympathetic dyspraxia
      • no comprehension deficits
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2
Q

What happens if you lesion the left arcuate faciculus?

A
  • Failure to carry out correct motor commands with either left or right limbs
    • Section of the language “audio-motor” pathway
    • Connects Audio to motor areas
  • Also affect visual cortex so imitation would be affected
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3
Q

What happens if you lesion the anterior CC?

A
  • Disconnection of premotor regions
    • can carry verbal commands with right hand but not with left
      • write right but not left
        • Left:
          • aphasic writing
    • Can imitate perfectly
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4
Q

What happens if you lesion the temporo-parieto-occipital junction?

A
  • Extensive lesions
  • Semantic information
    • ideational apraxia
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5
Q

What is apperceptive agnosia?

A
  • Problem with perception encoding
  • Similar to blind
  • Can’t
    • integrate parts of an image into a whole
    • copy images
  • Can
    • Appropriately reach or grab objects
  • Lesions:
    • bilateral infero-occipto-temporal lesion
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6
Q

What is the difference between constructive apraxia and apperceptive agnosia?

A
  • Constructional apraxia
    • Spatial relationship between objects in time (parietal)
  • Apperceptive agnosia
    • Integration of the parts of an object into a whole (visual path)
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