Sigma (12-16 Hz) and beta (20-28 Hz) EEG discriminate NREM and REM sleep

Sunao Uchida*, Tom Maloney, Irwin Feinberg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


All night sleep EEG from ten normal students were subjected to FFT spectral analyses. Delta (0.3-3 Hz), sigma (12-16 Hz) and beta (20-28 Hz) EEG showed strongly oscillating patterns across the night. The scattergram of sigma versus beta revealed two separate clusters. One cluster demonstrated a positive linear correlation between sigma and beta. The second cluster showed a range of beta, but a stable, low level of sigma activity. Points in the former cluster consisted of those from NREM epochs, and in the latter, from REM epochs. The present results suggest that REM and NREM EEG are composed of two sets of EEG frequency components, perhaps reflecting different neuronal pools.

Original languageEnglish
Pages (from-to)243-248
Number of pages6
JournalBrain Research
Issue number1-2
Publication statusPublished - 1994 Oct 3
Externally publishedYes


  • Beta
  • Computer analysis
  • Delta
  • EEG
  • Fast Fourier transform
  • Neurophysiology
  • Sigma
  • Sleep

ASJC Scopus subject areas

  • Developmental Biology
  • Molecular Biology
  • Clinical Neurology
  • General Neuroscience


Dive into the research topics of 'Sigma (12-16 Hz) and beta (20-28 Hz) EEG discriminate NREM and REM sleep'. Together they form a unique fingerprint.

Cite this