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Slowly progressive limb-kinetic apraxia

M Otsuki1, Y Soma, N Yoshimura

  • 1Department of Neurology, Niigata University, Japan.

European Neurology
|January 1, 1997
PubMed
Summary
This summary is machine-generated.

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This case study reports a unique presentation of limb-kinetic apraxia (LKA) and sensory deficits. The findings suggest a potential link between these symptoms and specific brain atrophy patterns.

Area of Science:

  • Neurology
  • Neuroscience
  • Radiology

Background:

  • Limb-kinetic apraxia (LKA) is a motor disorder characterized by difficulty with skilled, sequential movements.
  • Corticobasal degeneration (CBD) is a rare, progressive neurodegenerative disease affecting movement and cognition.
  • Understanding the specific neuroanatomical correlates of LKA is crucial for diagnosis and management.

Observation:

  • A 69-year-old female presented with a 3.5-year history of slowly progressive right-hand limb-kinetic apraxia (LKA).
  • Initial symptoms were limited to LKA and a two-point discrimination deficit, with later development of mild cogwheel rigidity in the right wrist.
  • Brain MRI revealed atrophy in the left central region, notably the postcentral gyrus.
  • 123I-IMP SPECT showed reduced tracer uptake in the atrophic areas.

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Findings:

  • The patient's presentation was atypical for corticobasal degeneration (CBD) due to the isolated and slowly progressive nature of LKA and sensory deficits.
  • Significant atrophy in the postcentral gyrus correlated with reduced cerebral blood flow, suggesting its role in the observed symptoms.
  • The simultaneous onset of LKA and impaired two-point discrimination may indicate a shared underlying mechanism.

Implications:

  • This case highlights the importance of considering atypical presentations of neurodegenerative diseases.
  • The findings suggest that the postcentral gyrus plays a critical role in the pathophysiology of LKA, particularly when combined with sensory deficits.
  • Further research is warranted to elucidate the specific mechanisms linking sensory processing and motor planning in LKA.