Focal-onset myoclonic seizures and secondary bilateral synchrony

Tomoyuki Akiyama, Elizabeth J. Donner, Cristina Y. Go, Ayako Ochi, O. Carter Snead, James T. Rutka, Hiroshi Otsubo

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We present a child with myoclonic seizures, epileptic spasms and generalized epileptiform discharges on scalp EEG. Magnetoencephalography and coherence-phase analysis for scalp EEG suggested focal onset in the left hemisphere. Intracranial video EEG confirmed seizure onset in the left frontal lobe with ictal high-frequency oscillations. Left frontal lobectomy suppressed his seizures. Subsets of myoclonic seizures can be focal in origin despite bilaterally synchronized epileptiform discharges on scalp EEG.

Original languageEnglish
Pages (from-to)168-172
Number of pages5
JournalEpilepsy Research
Issue number1-2
Publication statusPublished - Jun 1 2011
Externally publishedYes


  • Coherence-phase analysis
  • Ictal high frequency oscillations
  • Intracranial video EEG
  • Magnetoencephalography
  • Myoclonic seizures
  • Secondary bilateral synchrony

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology


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