Somatosensory evoked magnetic fields following electric tongue stimulation using pin electrodes

Neuroscience Research
Hitoshi MaezawaHidenao Fukuyama

Abstract

Quantitative evaluation of the sensory disturbance of the tongue is important clinically. However, because the conventional electrophysiological approach to the peripheral nerve cannot be used in the mandible owing to the deep route of the lingual nerve, we applied evoked potentials in the central nervous system. Somatosensory evoked magnetic fields (SEFs) following electric stimulation were recorded in 10 healthy subjects by means of pin electrodes placed on the tongue mucosa. Three or four components (P25m, P40m, P60m, and P80m) were identified over the contralateral hemisphere with unilateral stimulation. Because none of the components were consistently detected in all subjects, we evaluated the root mean square (RMS) of 18 channels over the contralateral hemisphere. To estimate the activated cortical response, we calculated the difference in mean RMS amplitude between 10 and 150 ms and that of the baseline period (aRMS=RMS[10, 150]-RMS[-50, -5]). The aRMS values for right-sided and left-sided stimulation were 10.18+/-7.92 and 10.99+/-8.98 fT/cm, respectively, and the mean laterality index, expressed by [(left-right)/(left+right)] was 0.025+/-0.104. This parameter can be useful for evaluating patients with unilateral sensory...Continue Reading

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Citations

Sep 17, 2013·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Hitoshi MaezawaHidenao Fukuyama
Feb 9, 2016·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Hitoshi MaezawaShigeyuki Fujita
Jun 28, 2015·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Hitoshi MaezawaMakoto Funahashi
Mar 29, 2013·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Yuichi KubotaDileep R Nair
Dec 3, 2014·Journal of the Neurological Sciences·Hitoshi MaezawaMakoto Funahashi
Apr 17, 2009·Current Opinion in Otolaryngology & Head and Neck Surgery·Emilia Michou, Shaheen Hamdy
Nov 12, 2017·Journal of Prosthodontic Research·Kazuya Yoshida
Feb 28, 2021·Fortschritte der Neurologie-Psychiatrie·Kazuya Yoshida

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