Table 2 Absolute and relative spectral power
From: Interictal quantitative EEG in migraine: a blinded controlled study
| Â | Mean absolute powera | Mean relative powera | ||||
|---|---|---|---|---|---|---|
Migraine (n = 33) | Controls (n = 31) | p | Migraine (n = 33) | Controls (n = 31) | p | |
Fronto-central | ||||||
 Delta power (μV2) | 7.4 (3.5) | 6.7 (2.8) | 0.39 | 0.30 (0.12) | 0.29 (0.14) | 0.64 |
 Theta power (μV2) | 4.6 (4.2) | 3.3 (1.8) | 0.28 | 0.15 (0.04) | 0.13 (0.04) | 0.06 |
 Alpha power (μV2) | 12.2 (12.3) | 10.9 (9.9) | 0.83 | 0.35 (0.15) | 0.35 (0.16) | 0.97 |
Parieto-occipital | ||||||
 Delta power (μV2) | 11.7 (10.3) | 8.5 (3.0) | 0.29 | 0.22 (0.13) | 0.20 (0.13) | 0.46 |
 Theta power (μV2) | 8.3 (11.8) | 5.2 (3.5) | 0.18 | 0.12 (0.04) | 0.10 (0.04) | 0.045 |
 Alpha power (μV2) | 45.8 (52.3) | 38.6 (35.3) | 1.00 | 0.50 (0.21) | 0.51 (0.21) | 0.73 |
Temporal | ||||||
 Delta power (μV2) | 8.9 (6.3) | 7.8 (3.2) | 0.80 | 0.24 (0.10) | 0.23 (0.13) | 0.42 |
 Theta power (μV2) | 6.4 (7.0) | 4.6 (3.0) | 0.26 | 0.14 (0.05) | 0.12 (0.04) | 0.037 |
 Alpha power (μV2) | 22.0 (21.1) | 21.2 (18.6) | 0.95 | 0.43 (0.16) | 0.43 (0.18) | 0.84 |