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Gaze-evoked involuntary movements.

K D Sethi1, D C Hess, R C Harbour

  • 1Department of Neurology, Medical College of Georgia, Augusta 30912-3200.

Movement Disorders : Official Journal of the Movement Disorder Society
|January 1, 1990
PubMed
Summary
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Voluntary gaze can trigger various neurological symptoms. In rare cases, eccentric gaze may cause involuntary facial twitching and arm movements, potentially due to ephaptic transmission.

Area of Science:

  • Neurology
  • Neurophysiology

Background:

  • Voluntary gaze is known to elicit diverse neurological phenomena.
  • These phenomena include vertigo, tinnitus, and various forms of nystagmus.

Observation:

  • This study reports on two patients experiencing unusual neurological responses to gaze.
  • Specifically, eccentric gaze in these patients triggered facial twitching and arm movements.

Findings:

  • Electroencephalograms (EEGs) showed no changes during these involuntary movements.
  • The observed movements suggest a link between gaze control and motor pathways.

Implications:

  • The precise pathogenesis remains unclear but may involve ephaptic transmission.
  • This finding could offer new insights into the neural mechanisms underlying gaze-evoked movements.

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