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[Transient involuntary movement disorders and thalamic infarction]

L Milandre1, C Brosset, B Gabriel

  • 1Service de Neurologie, CHU Timone, Marseille.

Revue Neurologique
|January 1, 1993
PubMed
Summary

Rare stroke-related nonepileptic transient dyskinesias are often linked to thalamic infarcts. This study found thalamic injury is a primary cause, frequently associated with small vessel disease.

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Area of Science:

  • Neurology
  • Neuroscience
  • Internal Medicine

Background:

  • Stroke-related nonepileptic transient dyskinesias are uncommon, with the precise location of ischemic injury often unclear.
  • Identifying the specific brain regions affected by ischemia is crucial for understanding the mechanisms of these movement disorders.

Observation:

  • This study analyzed 47 consecutive thalamic infarct cases, identifying five instances (10.6%) of associated transient dyskinesias.
  • Patient presentations included monochorea, hemiballism-hemichorea, choreoathetosis, and asterixis.
  • Neuroimaging confirmed the subthalamic nucleus was unaffected in all reported cases.

Findings:

  • Transient dyskinesias were predominantly linked to thalamic ischemic injury.
  • The onset of dyskinesias varied, appearing as early warning signs, associated symptoms, or during recovery phases.

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  • Small vessel disease emerged as the principal etiological factor in these cases.

    • Implications:

    • Thalamic infarcts should be considered in the differential diagnosis of unexplained transient dyskinesias.
    • Understanding the relationship between thalamic lesions and specific movement disorders can improve diagnostic accuracy.
    • Further research into small vessel disease as a cause of secondary movement disorders is warranted.