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Unilateral asterixis.

T Mizutani1, R Shiozawa, T Nozawa

  • 1Division of Neurology, Toranomon Hospital, Tokyo, Japan.

Journal of Neurology
|December 1, 1990
PubMed
Summary
This summary is machine-generated.

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Unilateral asterixis can result from lesions in the basal ganglia or thalamus. Bilateral asterixis does not rule out focal brain lesions, as seen in a diabetic patient with a putamen hematoma.

Area of Science:

  • Neurology
  • Neuroscience

Background:

  • Asterixis, characterized by sudden, brief, irregular muscle jerks, is often associated with metabolic encephalopathies.
  • While typically bilateral, unilateral presentations are less common and their underlying causes require further investigation.

Observation:

  • Three patients with unilateral asterixis were analyzed.
  • One patient, a diabetic with a left putamen hematoma, initially presented with bilateral asterixis that later localized to the right side.
  • Two other patients exhibited unilateral asterixis due to contralateral basal ganglia and thalamic hematomas.

Findings:

  • Lesions in the basal ganglia, in addition to the thalamus, can cause unilateral asterixis.
  • The presence of bilateral and symmetrical asterixis does not exclude a focal cerebral mass lesion.

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Implications:

  • This study expands the understanding of the neuroanatomical correlates of asterixis.
  • It highlights the importance of considering focal brain lesions in the differential diagnosis of both unilateral and bilateral asterixis.