Comparison of Baseline and Task Hemodynamic Responses: Cerebral Activation
CORTEX
The hemodynamic responses for both conditions are illustrated by the plotogramms (Fig. For the hand and shoulder tasks, common brain regions showed a significant increase in HbOFor both tasks, the activated areas were mainly contralateral. However we also found anipsilateral activation in the somatosensory cortex (CH8) only for the hand task.
Results of the hemodynamic response by task (Hand and Shoulder) for each channel. The results are expressed as means (average of the participants). Graph locations were organized according to the anatomical correspondence using the EEG 10/20 system. The time window analyzed was 30 s: from 10 s before the beginning of the task to 20 s after. The red traces indicate HbO
Changes in HbO*: p < 0.05 FDR correctedData are mean ± SEM, unit: µMol/L; channels 1 to 12 correspond to the right hemisphere and channels 13 to 24 correspond to the left hemisphereAbbreviations: CH = channel; HbO
Mean cerebral cortex activation maps for HbO