Table 1 Arousal states and EEG descriptions of EEG-vigilance stages
From: Test-retest reliability of brain arousal regulation as assessed with VIGALL 2.0
VIGALL | arousal state | EEG |
|---|---|---|
0 | high alertness | low amplitude EEG with high beta (12–25 Hz) power without horizontal slow eye movements |
A1 | relaxed wakefulness | dominant high alpha (8–12 Hz) in occipital regions of interest |
A2 | dominant high alpha (8–12 Hz) in parietal or temporal regions of interest | |
A3 | dominant high alpha (8–12 Hz) in frontal regions of interest | |
B1 | low amplitude EEG with high beta (12–25 Hz) power with horizontal slow eye movements | |
B2/3 | drowsiness | high delta (2–4 Hz) or theta (4–8 Hz) power |
C | sleep onset | K-complexes or sleep spindles |