Objectives: An enhanced ipsilateral motor potential after prefrontal TBI is known. Our aim was to examine, whether this contributes to movement initiation or execution.
Methods: EEGs of 22 patients and 28 healthy controls were recorded. Subjects performed self-initiated movements of their right index finger. From the resulting movement-related potentials difference curves of corresponding left and right hemispheric electrodes were calculated.
Results: We observed significantly reduced difference curves at parietal electrodes P3 - P4 in the patient group during movement execution, but not at movement initiation.
Conclusions: Our results point to compensatorily enhanced monitoring processes during movement execution following TBI. This is provided by enhanced activity of the ipsilateral postrolandic cortex, leading to the reduced preponderance observed in the present study.