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Related Experiment Videos

Methyl bromide myoclonus: an electrophysiological study.

A Uncini1, M Basciani, A Di Muzio

  • 1Institute of Clinical Neurology and Behavioral Sciences, University of Chieti, Vasto, Italy.

Acta Neurologica Scandinavica
|February 1, 1990
PubMed
Summary

Methyl bromide poisoning can cause myoclonus, characterized by involuntary muscle jerks. Electrophysiological tests revealed abnormalities in the corticospinal pathways, suggesting a cortical reflex myoclonus.

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Area of Science:

  • Neuroscience
  • Toxicology

Background:

  • Methyl bromide is a toxic gas used in fumigation.
  • Exposure can lead to neurological symptoms, including myoclonus.

Observation:

  • A patient developed multifocal myoclonus after overnight methyl bromide exposure.
  • Myoclonus was spontaneous, stimulus-induced, and movement-induced.

Findings:

  • Median somatosensory evoked potentials (SEPs) showed giant parietal and frontal waves.
  • EEG back-averaging revealed biphasic spikes preceding myoclonic jerks.
  • Long-latency reflexes were enhanced, indicating corticospinal pathway involvement.

Implications:

  • These findings suggest methyl bromide-induced myoclonus is a form of cortical reflex myoclonus.

Related Experiment Videos

  • This case highlights the neurotoxic potential of methyl bromide.
  • Understanding the electrophysiological basis is crucial for diagnosis and management.