Monitoring of Facial Nerve Function Through Pulsed Magnetic, Transcranial Stimulation

Monitoring of Facial Nerve Function Through Pulsed Magnetic, Transcranial Stimulation

Monitoring of Facial Nerve Function Through Pulsed Magnetic, Transcranial Stimulation

Maccabee et ai. (1988) were the first to report that mag-
netic coil stimulation of the occipitoparietal region of the
cortex resulted in forceful, bilateral facial and masticatory
muscle contractions. More recently, R6sler et al. (1991)
identified the actual site of facial nerve stimulation as the
labyrinthine segment of the facial canal. However, earlier
studies were limited because of the large size (90 mm) and
dynamics of the stimulating paddle containing the mag-
netic coil. Recently, a 25 mm double coil paddle (Magstim
200, Jali Medical Corp, Newton, Mass.) producing a more
focused stimulating pulse has become available. This de-
velopment offers the possibility of using transcranial,
pulsed magnetic stimulus as a tool for monitoring facial
nerve function.

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