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[A case with dressing apraxia]

Y Hayakawa1, K Suzuki, T Fujii

  • 1Section of Neuropsychology, Tohoku University Graduate School of Medicine, Sendai, Japan.

No to Shinkei = Brain and Nerve
|February 1, 1996
PubMed
Summary

A stroke patient experienced persistent dressing apraxia due to impaired mental rotation of visual imagery. This difficulty in mentally manipulating objects contributed to his dressing challenges.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Dressing apraxia, a specific deficit in performing the act of dressing, can result from focal brain lesions.
  • Understanding the precise cognitive mechanisms underlying dressing apraxia is crucial for targeted rehabilitation.

Observation:

  • A 56-year-old man developed severe dressing apraxia following a cerebral infarction.
  • He exhibited deficits in line orientation, constructional tasks, and right-left discrimination of external objects, but not of his own body.
  • Mild left unilateral neglect and visual extinction were also noted, alongside intact other neuropsychological functions.

Findings:

  • Detailed testing revealed profound impairment in visual imagery manipulation, specifically the inability to mentally rotate objects.
  • This deficit in mental object rotation was strongly correlated with the patient's dressing apraxia.
  • Magnetic Resonance Imaging (MRI) identified lesions in the right superior parietal lobule, angular gyrus, occipital cortex, corona radiata, and brainstem.

Implications:

  • The findings suggest that the ability to mentally rotate visual imagery is essential for complex visuomotor tasks like dressing.
  • This case highlights the specific role of the superior parietal lobule and related pathways in visual imagery-guided actions.
  • Further research can explore therapeutic strategies targeting visual imagery deficits to improve functional recovery in apraxia patients.

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