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Table 2 Summary of EEG states with sample sizes.

From: Peak and averaged bicoherence for different EEG patterns during general anaesthesia

EEG state Description Sample size
   Number of observations Number of subjects
1 Alpha with blinks/eye movements ± muscle/beta 13 8
2 Alpha with muscle/beta 16 6
3 Alpha with body movement/wander and muscle/beta 105 36
4 Alpha with body movement/wander 48 11
5 Alpha only 11 5
6 Alpha with theta 14 4
7 Alpha with theta and occasional delta (≤ 25% delta)* 444 31
8 Alpha with theta and moderate delta (25 ≥ 75% delta)* 999 40
9 Dominated by delta and alpha ± theta (> 75% delta)* 159 24
10 Burst suppression 61 14
  1. *This percentage is based on the time occupied by the delta activity.