Differences in cortical reorganization during visuo-motor tasks executed with the dominant and non-dominant hands

In the present study, we analysed EEG signals acquired during the execution of a visuomotor task with the right and the left hands in a group of young right-handed volunteers. The main aim was to assess differences in brain network organizations supporting movements with the dominant and non-dominant arms with respect to the resting period. Specifically, variations in the power content and network topology were explored in the subjective mu band with respect to a baseline condition. Our results showed that, although similar variations are observed in the power content during the movement with both hands, the motor tasks executed with the dominant hand are associated to an enhanced network reorganization with respect to the baseline condition. Conversely, the movement with the non-dominant arm was not associated to significant network reorganization. These findings are a further step towards the quantification of cortical effects related to motor training or motor rehabilitation techniques.