Cortical Problems

 

  • Frontal lobe lesions

    Presentation

    • Personality changes: apathy, disinhibition.
    • Hemiplegia
    • Expressive aphasia.

  • Temporal lobe lesions

    Presentation

    • Memory impairment.
    • Wernicke's aphasia, especially if dominant hemisphere (usually left).
    • Upper homonymous quadrantanopia.

  • Parietal lobe lesions

    Presentation

    • Calculation problems.
    • Perceptual/spatial problems.
    • Apraxia: disorder of motor planning.
    • Homonymous hemianopia or lower homonymous quadrantanopia.
    • Hemispatial neglect. Usually a right lesion causing left visual neglect.
    • Hemisensory loss.
    • Nominal aphasia.

  • Occipital lobe lesions

    Presentation

    • Visual changes.
    • Field defects including hemianopia or quadrantanopia.

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