Clinical Study

Quantitative Electroencephalography and Behavioural Correlates of Daytime Sleepiness in Chronic Stroke

Table 2

Pre- to Posttask change in EEG power ( values): negative values indicate an increase in EEG power. Significant changes are identified as * ≤0.05, ** ≤0.001, and *** ≤0.0001.

DeltaThetaAlphaBeta

Lesioned hemisphere
 Frontal2.84**3.42**3.60***−1.86
 Central−0.732.73**3.54**3.69**
 Parietal−0.40−1.582.50**4.39***
 Occipital−0.932.70**2.99**−0.41
Nonlesioned hemisphere
 Frontal−0.57−1.913.15**−1.42
 Central−0.642.34*5.38***3.68***
 Parietal−1.62−1.283.57**4.72***
 Occipital−1.60−1.823.38**−0.61
Controls
 Frontal−0.704.06***4.32***4.96***
 Central0.791.793.38**4.63***
 Parietal−0.322.11*−1.902.72**
 Occipital−1.422.31*3.67**−1.01