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Slowly progressive apraxia: two case studies

P Azouvi1, C Bergego, L Robel

  • 1Service de Rééducation Neurologique, Hôpital Raymond Poincaré, Garches, France.

Journal of Neurology
|June 1, 1993
PubMed
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This study presents two cases of severe motor apraxia, a condition affecting purposeful movement. Findings suggest distinct neural pathways for different hand actions and potential links between apraxia and cognitive decline.

Area of Science:

  • Neuroscience
  • Cognitive Neurology
  • Neuropsychology

Background:

  • Motor apraxia is a disorder of purposeful, learned movement.
  • Understanding the neural basis of apraxia is crucial for diagnosing and treating motor control deficits.

Observation:

  • Two patients with slowly progressive, severe motor apraxia were studied.
  • One patient exhibited isolated apraxia, while the second had memory and intellectual decline.
  • Impaired object use recognition in the second patient indicated a disturbance in motor knowledge.

Findings:

  • Apraxia was asymmetrical in both patients.
  • Contralateral upper parietal cortex atrophy correlated with apraxia.
  • Evidence suggests differential involvement of separate action systems for each hand.

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Implications:

  • Findings highlight the role of the upper parietal cortex in motor control.
  • Suggests distinct neural substrates for distinct action systems.
  • Links between apraxia and broader cognitive dysfunction warrant further investigation.