Table 2.
Comparative analysis of power levels distributed on the scalp of healthy controls. Data were based on 16 healthy controls.
| Frontal scalp (F; μV2)b | Rear scalp (R; μV2) | F/R ratio | P valuec | |
|---|---|---|---|---|
| δ a | 13.2 ± 0.1 | 10.4 ± 0.1 | 1.3 | P < 0.001 |
| θ | 6.9 ± 0.1 | 8.8 ± 0.1 | 0.8 | P > 0.05 |
| α | 12.4 ± 0.1 | 35.2 ± 0.6 | 0.4 | P < 0.001 |
| β | 6.4 ± 0.1 | 11.6 ± 0.1 | 0.6 | P < 0.001 |
| γ | 1.6 ± 0.1 | 1.7 ± 0.1 | 0.9 | P > 0.05 |
a δ, 1–4 Hz; θ, 4–8 Hz; α, 8–12 Hz; β, 12–30 Hz; and γ, 30–50 Hz. bFrontal (F), FP1, FP2, F3, F4, F7, F8, and Fz); Rear (R), O1, O2, P3, P4, T5, T6, and Pz). Note that the electrode located in the middle (T3, T4, C3, C4, and Cz) were excluded in the data analysis. cSignificance was determined by repeated measures ANOVA.