Regional electroencephalographic asymmetries in bipolar seasonal affective disorder before and after exposure to bright light

John J. Allen, William G. Iacono, Richard A. Depue, Paul Arbisi

Research output: Contribution to journalArticle

166 Scopus citations


Electroencephalographic (EEG) asymmetries found in nonseasonal depression were examined in seasonal affective disorder before and after bright-light exposure. Subjects with seasonal depression demonstrated the expected pattern of frontal asymmetry both when depressed and following light-induced remission. Right-hemisphere EEG coherence, by contrast, served as a state-dependent indicator of seasonal depression.

Original languageEnglish (US)
Pages (from-to)642-646
Number of pages5
JournalBiological Psychiatry
Issue number8-9
StatePublished - Jan 1 1993



  • EEG
  • SAD
  • asymmetry
  • coherence
  • depression
  • phototherapy

ASJC Scopus subject areas

  • Biological Psychiatry

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