Abstract
Using magnetoencephalography (MEG) and functional magnetic resonance imaging (f-MRI), we investigated the areas of the cerebral cortex that were activated when patients with brachial plexus injuries performed elbow flexion, a motion re-acquired through nerve transfer surgery. In all patients, elbow flexion on the operated side and on the unaffected side led to the activation of an area in the motor cortex, with these areas being located almost symmetrically on either side of the sagittal midline. These findings suggest that the activity center for the transferred intercostal nerves shifted to the motor cortex for the elbow, from the original intercostal nerve site.
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