Quantitative analysis of the EEG posterior-dominant rhythm in healthy adolescents

L. V. Marcuse, M. Schneider, K. A. Mortati, K. M. Donnelly, V. Arnedo, A. C. Grant

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Objective: Pivotal studies of the normal EEG posterior-dominant rhythm (PDR) typically relied on visual inspection of a few seconds of EEG data from a relatively small number of subjects in each age category. We sought to analyze and characterize the PDR in a large cohort of healthy 15-year-olds, and to determine if PDR characteristics mature over the following year. Methods: Seventy-nine healthy 15-year-olds free of neurologic and psychiatric disease underwent a resting-awake EEG, which was repeated 1 year later. In each study, PDR frequency was determined with fast Fourier transform analysis of a continuous 2-min EEG segment. t-Tests were used to compare relevant variables. Results: From age 15 to 16 the mean PDR frequency increased from 9.9 to 10.0 Hz, a small but statistically significant difference. The PDR frequency range at both ages was 8.9-11.0 Hz, similar to values reported in prior studies on healthy young adults. There was no significant difference in PDR frequency between genders or hemispheres. Conclusions: Maturation of the PDR is nearly complete at age 16. The frequency range of the PDR in healthy adolescents and adults is substantially narrower than the alpha band. Significance: Based on this and prior studies, a PDR frequency of less than 8.5 or greater than 11.5 Hz should be considered abnormal in adolescents and adults.

Original languageEnglish
Pages (from-to)1778-1781
Number of pages4
JournalClinical Neurophysiology
Volume119
Issue number8
DOIs
StatePublished - Aug 2008
Externally publishedYes

Keywords

  • Adolescent
  • Alpha rhythm
  • EEG
  • Posterior-dominant rhythm

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