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Normal patterns

Authoring team

Normal rhythms are categorized into awake and sleep patterns.

  • Awake patterns include the α rhythm and its variants, μ rhythm, λ waves, posterior slow waves of youth, hyperventilation-induced slowing, photic driving, and photomyogenic response. Alpha are 8-12 Hz in occipital and parietal regions, beta are more than 12 Hz in frontal regions
  • Sleep patterns include positive occipital sharp transients of sleep, vertex waves, spindles, K complexes, sleep-related hypersynchrony, and frontal arousal rhythm.

Reference

  1. Amin U et al. Normal variants and artifacts: Importance in EEG interpretation. Epileptic Disord. 2023 Oct;25(5):591-648.

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