Factor analysis of the EEG indicates inconsistencies in traditional frequency bands

T. S. Lorig, G. E. Schwartz

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


CNS activation, as measured by the EEG, has been assumed to be a unitary and homogeneous phenomenon which comprises shifts in the amount of activity in the alpha and beta frequency ranges. Factor analysis of EEG activity in the present study revealed a structure of EEG frequencies inconsistent with traditional EEG bands such as alpha and beta. Factors identified in this new structure correlated with a variety of self-report items and tended to simplify the relationship between self-report and traditional EEG bands. These results indicate that EEG arousal is heterogeneous and suggests that studies examining localized areas of high EEG activation must now account for the type of activity present in the area rather than changes along an arousal continuum.

Original languageEnglish (US)
Pages (from-to)369-375
Number of pages7
JournalJournal of Psychophysiology
Issue number4
StatePublished - 1989

ASJC Scopus subject areas

  • Neuroscience(all)
  • Neuropsychology and Physiological Psychology
  • Physiology


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