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ダブルアゴニストとアンタゴニストの筋肉の振動は,変化の無いエンドポイントのバイアスを生み出します

Gregg Eschelmuller¹, J Timothy Inglis², Hyosub Kim^2,3

¹School of Kinesiology, University of British Columbia, Vancouver, BC, Canada. gregg.eschelmuller@ubc.ca.

Experimental brain research

|September 2, 2025

まとめ

筋肉が振動すると動きの方向が変わりますシングルバイブレーションはオーバーショットまたはアンダーショットを引き起こし,ダブルバイブレーションは予期せぬ形で変異性を増加させずにエンドポイントの精度を偏移させた.

科学分野:

神経科学
人間運動制御
自己認識

背景:

筋肉のスパインドルは筋肉の長さの情報を中枢神経系 (CNS) に伝達するために極めて重要です
筋肉のの振動は幻の四肢の位置を喚起し潜在的に自己受容的フィードバックを妨げる可能性があります
目標に導かれた運動中にアゴニストとアタゴニストの筋肉からの運動フィードバックの利用は,まだ完全に理解されていません.

研究の目的:

シングル (アゴニストまたはアンタゴニスト) とデュアル (アゴニスト/アンタゴニスト) の筋肉の振動が標的方向に与える影響を調査する.
運動精度とエンドポイントバイアスにプロイオセプティブフィードバックモジュレーションがどのように影響するかを決定する.

主な方法:

参加者は3つの条件で肘の伸縮作業を行った. 振動なし,単一の筋肉の振動 (アゴニストまたはアンタゴニスト),および二重の筋肉の振動.
運動エンドポイントバイアスと変数エラーを評価するために,動力学的データを分析した.

主要な成果:

敵の筋肉の振動は目標の低射程を誘導し,敵の筋肉の振動は目標の高射程を誘導した.
単一の振動条件のいずれも,動きの変数誤差を有意に変化させなかった.
ダブルアゴニスト/アンタゴニストの振動は,増加した騒音の仮説に反して,運動の変動性を増加させずに,有意な下射バイアスを引き起こしました.

結論:

単一の筋肉の振動は,目標に向かって,または目標から遠ざかる動きをバイアスすることができます.
二重の筋肉の振動は,必ずしも騒々しい自己感受システムを誘導するわけではありませんが,運動のエンドポイントの精度を体系的に変化させることができます.
これらの発見は,運動制御中の自己感受性アフェレンスの複雑な処理を強調しています.

キーワード:

キネステシアモーター制御筋肉のスパイドル自己認識の振動

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