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Related Experiment Videos

Repetitive paroxysmal nystagmus and vertigo

M C Lawden1, A M Bronstein, C Kennard

  • 1Academic Unit of Neuroscience, Charing Cross and Westminster Medical School, London, UK.

Neurology
|February 1, 1995
PubMed
Summary

A patient with vertigo and nystagmus experienced relief with carbamazepine. This treatment targeted abnormal hyperactivity in the damaged vestibular nucleus caused by an arteriovenous malformation.

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Area of Science:

  • Neurology
  • Neuroscience
  • Ophthalmology

Background:

  • Vestibular disorders can manifest with complex nystagmus and vertigo.
  • Arteriovenous malformations (AVMs) near the vestibular nucleus are rare causes of neurological symptoms.

Observation:

  • A 55-year-old woman presented with episodic vertigo and visual blurring.
  • These episodes were characterized by paroxysmal, complex nystagmus (torsional, horizontal, vertical) occurring every 2 minutes.
  • A subtle, opposite-direction nystagmus was noted between attacks.

Findings:

  • Brain MRI revealed an arteriovenous malformation adjacent to the left vestibular nucleus with signs of prior hemorrhage.
  • Caloric testing indicated a left vestibular paresis.
  • The patient's symptoms were attributed to intermittent hyperactivity bursts from the damaged left vestibular nucleus, exacerbating resting nystagmus.

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Implications:

  • This case highlights a potential mechanism for episodic nystagmus and vertigo in patients with vestibular nucleus AVMs.
  • Low-dose carbamazepine demonstrated efficacy in managing these specific symptoms.
  • Understanding vestibular nucleus dysfunction is crucial for diagnosing and treating complex balance and visual disturbances.