Contralateral dominance of corticomuscular coherence for both sides of the tongue during human tongue protrusion: An MEG study.

Maezawa Hitoshi; Mima Tatsuya; Yazawa Shogo; Matsuhashi Masao; Shiraishi Hideaki; Hirai Yoshiyuki; Funahashi Makoto

Title	en Contralateral dominance of corticomuscular coherence for both sides of the tongue during human tongue protrusion: An MEG study.
Creator	en Maezawa, Hitoshi NRID 1000080567727 en Mima, Tatsuya NRID 1000020324618 en Yazawa, Shogo en Matsuhashi, Masao NRID 1000040456885 en Shiraishi, Hideaki NRID 1000080374411 en Hirai, Yoshiyuki en Funahashi, Makoto NRID 1000080221555
Accessrights	open access
Subject	Other en Hypoglossal motor nucleus Other en Isometric muscle contraction Other en Magnetoencephalography Other en Neural oscillation Other en Primary motor cortex NDC 497
Description	Abstract en Sophisticated tongue movements contribute to speech and mastication. These movements are regulated by communication between the bilateral cortex and each tongue side. The functional connection between the cortex and tongue was investigated using oscillatory interactions between whole-head magnetoencephalographic (MEG) signals and electromyographic (EMG) signals from both tongue sides during human tongue protrusion compared to thumb data. MEG-EMG coherence was observed at 14-36Hz and 2-10Hz over both hemispheres for each tongue side. EMG-EMG coherence between tongue sides was also detected at the same frequency bands. Thumb coherence was detected at 15-33Hz over the contralateral hemisphere. Tongue coherence at 14-36Hz was larger over the contralateral vs. ipsilateral hemisphere for both tongue sides. Tongue cortical sources were located in the lower part of the central sulcus and were anterior and inferior to the thumb areas, agreeing with the classical homunculus. Cross-correlogram analysis showed the MEG signal preceded the EMG signal. The cortex-tongue time lag was shorter than the cortex-thumb time lag. The cortex-muscle time lag decreased systematically with distance. These results suggest that during tongue protrusions, descending motor commands are modulated by bilateral cortical oscillations, and each tongue side is dominated by the contralateral hemisphere.
Date	Issued2014-11-01
Language	eng
Resource Type	journal article
Version Type	AM
Identifier	HDL http://hdl.handle.net/2115/57676
Relation	isVersionOf DOI https://doi.org/10.1016/j.neuroimage.2014.07.018 PMID 25038437
Journal	PISSN 1053-8119 EISSN 1095-9572 NCID AA10850776 en NeuroImage Volume Number101 Page Start245 Page End255
File	fulltext Manuscript.pdf 2.11 MB (application/pdf) Issued2014-11-01
Oaidate	2023-07-26