Beta Wave tracing in EEG is found in
EEG waves wave frequency condition beta > 13Hz during cognitive effos, drowsiness and light sleep alpha 8-13Hz relaxed wakefulness with eyes closed theta 4-7.5Hz deep sleep, hyperventillation delta 0.1-3.5Hz drowsiness, deep sleep Ref: Standard EEG in clinical psychiatry, Wiley-blackwell, 1e, pg 34.
REM sleep
NREM sleep
Quiet wakefulness
Awake
Sleep disorders and eating disorders