Abstract
The possiblilty has been reported that the orbicularis oris muscle is controled by both contralateral and ipsilateral facial nerves. We therefore investigated the clinical significance of this phenomenon based on the function of evoked electromyograpy (EGM). After normal side facial nerve stimulation, with an increase in the facial nerve denaturation, the amplitude of the ipsilateral evoked electromyography of the orbicularis oris muscle increased and the incubation period was also prolonged.
