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Related Experiment Videos

Periodic downbeat nystagmus

R Du Pasquier1, F Vingerhoets, A B Safran

  • 1Neurology Clinic, Geneva's University Hospital, Genève, Switzerland.

Neurology
|November 18, 1998
PubMed
Summary
This summary is machine-generated.

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Severe hypomagnesemia caused a rare periodic downbeat nystagmus in a scleroderma patient. This metabolic nystagmus, potentially linked to thiamine deficiency, resolved without brain lesions or abnormal EEG findings.

Area of Science:

  • Neurology
  • Metabolic Disorders
  • Ophthalmology

Background:

  • Scleroderma is an autoimmune disease that can cause systemic complications.
  • Hypomagnesemia, or low magnesium levels, can lead to various neurological symptoms.
  • Periodic nystagmus is a rare form of involuntary eye movement.

Observation:

  • A patient with scleroderma and severe hypomagnesemia presented with periodic downbeat nystagmus.
  • The nystagmus occurred in cycles of 3 minutes 30 seconds, with downward beating for 90 seconds every 2 minutes.
  • The nystagmus persisted for 86 hours.

Findings:

  • Brain imaging revealed no structural lesions.
  • Electroencephalogram (EEG) performed during the nystagmus episodes was normal.

Related Experiment Videos

  • The findings suggest a metabolic etiology for the periodic nystagmus.

    • Implications:

    • Severe hypomagnesemia is a potential cause of periodic downbeat nystagmus.
    • Thiamine deficiency may be associated with this metabolic nystagmus.
    • This case highlights the importance of metabolic evaluation in patients with unexplained nystagmus.