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Clinical Questions

  • AwakeAlpha rhythm 8 to 13 Hz in over 50% of the epoch, clearest in O2, eye blinks, high chin tone<5%
  • Stage 1Alpha drops below 50%, low voltage theta 4 to 7 Hz, vertex sharp waves, slow rolling eye movements5%
  • Stage 2Sleep spindles 11 to 16 Hz, K-complexes, theta background, still eyes, lower chin tone50%
  • Stage 3Slow waves 0.5 to 2 Hz over 75 µV in 20% or more of the epoch, largest in F4, low chin tone20%
  • REMLow voltage mixed frequency EEG, sawtooth waves 2 to 6 Hz, rapid eye movements, lowest chin tone with brief twitches25%

Handbook for Providers

Jet Lag Disorder

Def: temporary misalignment between body clock and destination solar/sleep-wake cycleTypically after trans-meridian travel across ≥3 time zones Direction of travelUsually…

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Shift Work Disorder (SWD)

Def: insomnia and excessive sleepiness from work hours that overlap usual sleep timeMore common with night, early or rotating shifts…

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