Table 2 Arousal Stability Score corresponding to occurrence of certain vigilance stages during a 15-min resting EEG.
Score | Stability Level (criterion) | Operational definition |
|---|---|---|
11 | Level 1: less than 1/3 of all segments not classified as 0/A- or 0/A1-stages | rigidity, only appearance of 0 and A1 stages |
10 | rigidity, only appearance of 0 and A stages | |
9 | Level 2: at least 1/3 of all segments classified as B (B1 + B2/3)-stages | stage B emerged in minute 11–15 |
8 | stage B emerged in minute 6–10 | |
7 | stage B emerged in minute 1–5 | |
6 | Level 3: at least 1/3 of segments classified as B2/3-stages | stage B2/3 emerged in minute 11–15 |
5 | stage B2/3 emerged in minute 6–10 | |
4 | stage B2/3 emerged in minute 1–5 | |
3 | Level 4: occurrence of at least 1 C-stage | stage C emerged in minute 11–15 |
2 | stage C emerged in minute 6–10 | |
1 | stage C emerged in minute 1–5 |
