Intraoperative Monitoring of Hypoglossal Nerve Using Hypoglossal Motor Evoked Potential in Infratentorial Tumor Surgery: A Report of Two Cases.
10.5535/arm.2018.42.2.352
- Author:
Seung Yeun KIM
1
;
Hyo Won IM
;
Young Doo CHOI
;
Keewon KIM
;
Jin Wook KIM
;
Yong Hwy KIM
;
Han Gil SEO
Author Information
1. Department of Rehabilitation Medicine, Seoul National University Hospital, Seoul, Korea. hangil_seo@snuh.org
- Publication Type:Case Report
- Keywords:
Intraoperative monitoring;
Motor evoked potentials;
Hypoglossal nerve
- MeSH:
Brain;
Electromyography;
Evoked Potentials, Motor*;
Humans;
Hypoglossal Nerve*;
Infratentorial Neoplasms*;
Monitoring, Intraoperative*;
Muscles;
Tongue
- From:Annals of Rehabilitation Medicine
2018;42(2):352-357
- CountryRepublic of Korea
- Language:English
-
Abstract:
The hypoglossal nerve (CN XII) may be placed at risk during posterior fossa surgeries. The use of intraoperative monitoring (IOM), including the utilization of spontaneous and triggered electromyography (EMG), from tongue muscles innervated by CN XII has been used to reduce these risks. However, there were few reports regarding the intraoperative transcranial motor evoked potential (MEP) of hypoglossal nerve from the tongue muscles. For this reason, we report here two cases of intraoperative hypoglossal MEP monitoring in brain surgery as an indicator of hypoglossal deficits. Although the amplitude of the MEP was reduced in both patients, only in the case 1 whose MEP was disappeared demonstrated the neurological deficits of the hypoglossal nerve. Therefore, the disappearance of the hypoglossal MEP recorded from the tongue, could be considered a predictor of the postoperative hypoglossal nerve deficits.
