[Reduced contralateral preponderance of the movement-related potential during execution of self-initiated movements in acute prefrontal traumatic brain injury].
OBJECTIVE
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.
Wiese
Holger
H
Neurologische Klinik der Universität Duisburg-Essen. holger.wiese@uni-essen.de
Stude
Philipp
P
Nebel
Katharina
K
Osenberg
Dorothea
D
Ischebeck
Werner
W
Stolke
Dietmar
D
Diener
Hans Christoph
HC
Keidel
Matthias
M
D000328:Adult; D001924:Brain Concussion / Q000175:diagnosis / Q000503:physiopathology*; D004292:Dominance, Cerebral / Q000502:physiology*; D019054:Evoked Potentials, Motor / Q000502:physiology*; D005385:Fingers / Q000294:innervation*; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D009043:Motor Activity / Q000502:physiology*; D009415:Nerve Net / Q000503:physiopathology; D010296:Parietal Lobe / Q000293:injuries / Q000503:physiopathology; D017397:Prefrontal Cortex / Q000293:injuries* / Q000503:physiopathology; D012016:Reference Values; D013702:Temporal Lobe / Q000293:injuries / Q000503:physiopathology