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Movement-related cortical magnetic fields associated with self-paced tongue protrusion in humans


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タイトル: Movement-related cortical magnetic fields associated with self-paced tongue protrusion in humans
その他のタイトル: Readiness fields to human tongue protrusion
著者: Maezawa, Hitoshi 著作を一覧する
Oguma, Hidetoshi 著作を一覧する
Hirai, Yoshiyuki 著作を一覧する
Hisadome, Kazunari 著作を一覧する
Shiraishi, Hideaki 著作を一覧する
Funahashi, Makoto 著作を一覧する
キーワード: magnetoencephalography
readiness fields
motor fields
hypoglossal motor nucleus
voluntary movement
発行日: 2017年 4月
出版者: Elsevier
誌名: Neuroscience Research
巻: 117
開始ページ: 22
終了ページ: 27
出版社 DOI: 10.1016/j.neures.2016.11.010
抄録: Sophisticated tongue movements are coordinated finely via cortical control. We elucidated the cortical processes associated with voluntary tongue movement. Movement-related cortical fields were investigated during self-paced repetitive tongue protrusion. Surface tongue electromyograms were recorded to determine movement onset. To identify the location of the primary somatosensory cortex (S1), tongue somatosensory evoked fields were measured. The readiness fields (RFs) over both hemispheres began prior to movement onset and culminated in the motor fields (MFs) around movement onset. These signals were followed by transient movement evoked fields (MEFs) after movement onset. The MF and MEF peak latencies and magnitudes were not different between the hemispheres. The MF current sources were located in the precentral gyrus, suggesting they were located in the primary motor cortex (M1); this was contrary to the MEF sources, which were located in S1. We conclude that the RFs and MFs mainly reflect the cortical processes for the preparation and execution of tongue movement in the bilateral M1, without hemispheric dominance. Moreover, the MEFs may represent proprioceptive feedback from the tongue to bilateral S1. Such cortical processing related to the efferent and afferent information may aid in the coordination of sophisticated tongue movements.
Rights: © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 前澤 仁志


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