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KAKEN_16K12971seika.pdf
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Download
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:Oct 31, 2019 |
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運動誤差の修正に関わる感覚運動統合の機序を脳波筋電図コヒーレンスから解明する
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ウンドウ ゴサ ノ シュウセイ ニ カカワル カンカク ウンドウ トウゴウ ノ キジョ オ ノウハ キンデンズ コヒーレンス カラ カイメイスル
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Undō gosa no shūsei ni kakawaru kankaku undō tōgō no kijo o nōha kindenzu kohīrensu kara kaimeisuru
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Clarifying neural mechanisms behind sensorimotor integration related to motor error correction by means of corticomuscular coherence measurements
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牛山, 潤一
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ウシヤマ, ジュンイチ
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Ushiyama, Jun'ichi
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慶應義塾大学・環境情報学部 (藤沢)・准教授
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Research team head
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科研費研究者番号 : 60407137
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上野, 良揮
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ウエノ, ヨシキ
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Ueno, Yoshiki
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鳥山, 央人
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トリヤマ, ヒサト
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Toriyama, Hisato
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鈴木, 里奈
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スズキ, リナ
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Suzuki, Rina
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2019
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科学研究費補助金研究成果報告書
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2018
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本研究では，運動指令の不正確性や身体システムの冗長性に起因する運動誤差の修正に関わる神経機序を，運動皮質と骨格筋の同期性の指標である「脳波筋電図コヒーレンス (CMC)」から検討した．研究1では，急峻な力発揮と保持を断続的に繰り返す課題を行った結果，運動初期の力の超過が大きいほど，CMCが有意に高まった．研究2では，断続的課題中に，突然自身の力が高すぎる／低すぎるように見せかける実験環境をつくった結果，力の下方修正が必要なときほど，CMCが高まる傾向がみられた．以上の結果から，我々の脳－身体システムは，運動誤差が大きく，力を弱めてこれに対応するときほど，脳と筋の同期性を高めることが示唆された．
This study tried to clarify neural mechanisms to correct motor errors depending on inaccuracy of motor command and/or redundancy of our bodily system, by measuring corticomuscular coherence between electroencephalogram signals over the motor cortex and electromyogram signals from activated muscle. In Research 1, participants performed intermittent contraction task by repeating ballistic force development and static force retainment. As a result, the greater the initial force exceedance, the stronger the CMC. In Research 2, we constructed the experimental environment to disguise participants as exceeding or falling their muscle force. As a result, CMC was greater when they need to correct their muscle force downwardly. There results suggest that the motor cortex and muscle enhance their synchronization when we need to correct greater motor error by weakening our muscle force.
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研究種目 : 挑戦的萌芽研究
研究期間 : 2016～2018
課題番号 : 16K12971
研究分野 : 運動生理学
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