Quantitative Electroencephalography and Behavioural Correlates of Daytime Sleepiness in Chronic Stroke

Table 3

Correlations between KSS and EEG power density at pre- (a) and posttask (b): Pearson’s 𝑟 coefficient is presented. Significant correlations are identified as * ≤0.05, ** ≤0.001.

(a)

Pretask	Delta	Theta	Alpha	Beta
Lesioned hemisphere
Frontal	0.04	0.12	0.20	0.24
Central	0.10	0.09	0.15	𝟎.𝟑𝟏^∗
Parietal	0.11	−0.03	0.13	0.18
Occipital	0.15	0.07	𝟎.𝟑𝟗^∗∗	0.16
Nonlesioned hemisphere
Frontal	0.07	0.02	0.18	0.16
Central	0.07	0.14	0.24	𝟎.𝟑𝟏^∗
Parietal	−0.02	0.06	0.15	𝟎.𝟑𝟓^∗
Occipital	0.07	0.06	0.24	0.19
Control
Frontal	0.23	𝟎.𝟓𝟏^∗∗	0.31	0.04
Central	0.28	𝟎.𝟓𝟔^∗∗	𝟎.𝟒𝟒^∗	0.33
Parietal	0.34	𝟎.𝟒𝟑^∗	0.24	0.19
Occipital	0.14	𝟎.𝟒𝟒^∗	0.14	0.26

(b)

Posttask	Delta	Theta	Alpha	Beta
Lesioned hemisphere
Frontal	0.20	0.18	0.30	0.05
Central	0.15	0.04	0.19	0.13
Parietal	0.05	−0.14	0.05	−0.05
Occipital	0.17	0.10	𝟎.𝟑𝟔^∗	0.10
Nonlesioned hemisphere
Frontal	0.13	0.06	0.21	−0.12
Central	0.26	0.18	𝟎.𝟑𝟒^∗	0.09
Parietal	0.09	0.16	𝟎.𝟑𝟏^∗	0.06
Occipital	0.17	0.20	0.32	0.13
Control
Frontal	0.35	𝟎.𝟑𝟗^∗	0.24	−0.03
Central	0.05	𝟎.𝟑𝟕^∗	𝟎.𝟒𝟖^∗	0.41
Parietal	0.25	𝟎.𝟒𝟏^∗	𝟎.𝟑𝟖^∗	0.33
Occipital	−0.11	0.27	0.09	0.19