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Related Experiment Videos

Partial motor epilepsy with "negative myoclonus".

F Cirignotta1, E Lugaresi

  • 1Institute of Neurology, University of Bologna, Italy.

Epilepsia
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

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This study observed three children with nocturnal seizures and daytime "negative myoclonus" resembling asterixis. Neurophysiologic findings revealed spike discharges linked to arm postural lapses, with good seizure control using benzodiazepines.

Area of Science:

  • Neurology
  • Pediatric Neurology
  • Epileptology

Background:

  • Epilepsy in children presents with diverse seizure types.
  • Nocturnal motor seizures and daytime myoclonus can be challenging to diagnose.
  • Understanding the neurophysiological underpinnings is crucial for effective management.

Observation:

  • Three pediatric patients exhibited concurrent nocturnal unilateral motor seizures and frequent ipsilateral daytime negative myoclonus.
  • The negative myoclonus presented with such high frequency it mimicked asterixis.
  • Symptoms were consistently ipsilateral, affecting the same side of the body.

Findings:

  • Neurophysiologic studies revealed lateralized spike discharges on electroencephalography (EEG).
  • These spike discharges were precisely time-locked to the postural lapses observed in the contralateral outstretched arm.

Related Experiment Videos

  • This suggests a direct link between cortical electrical activity and the observed myoclonic events.

    • Implications:

    • This specific seizure semiology may represent a distinct epilepsy syndrome in children.
    • Benzodiazepines demonstrated efficacy in controlling both seizure types.
    • Further research is warranted to elucidate the precise pathophysiology and long-term prognosis.