Alpha-delta sleep in a case with non-24 h sleep-wake syndrome: Quantitative electroencephalogram analysis of alpha and delta band waves

Makoto Honda, Einosuke Koga, Tohku Ishikawa, Toshinori Kobayashi, Akira Sawa, Yasuro Takahashi, Yutaka Honda

Research output: Contribution to journalArticle

Abstract

Four all-night polysomnograms of a 39-year-old male patient with non-24 h sleep-wake syndrome were recorded. We analysed electroencephalograms (EEG) with the power spectrum method and the wave pattern recognition analysis of Fujimori. The EEG of the rest waking condition showed normal patterns. High- voltage diffuse alpha band waves were observed in sleep stages 2, 3, and 4. The integrated area of the alpha band waves in the analysis epochs showed a strong positive correlation to the delta band components in the power spectrum of the same epoch during sleep (correlation coefficients r = 0.762- 0.815). Alpha band waves during sleep were clearly different from the alpha waves in the rest waking condition, with respect to slower peak frequency and the frontal dominant voltage distribution.

Original languageEnglish (US)
Pages (from-to)387-392
Number of pages6
JournalPsychiatry and Clinical Neurosciences
Volume51
Issue number6
DOIs
StatePublished - Jan 1 1997
Externally publishedYes

Keywords

  • Alpha-delta sleep
  • Circadian rhythm sleep disorder
  • Electroencephalogram analysis
  • Fujimori's method
  • Polysomnogram

ASJC Scopus subject areas

  • Neuroscience(all)
  • Neurology
  • Clinical Neurology
  • Psychiatry and Mental health

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