慢性的な足首の不安定性のある人の眼を閉ざした片側姿勢で,常見の皮質脊髄の入力が増える
Xiaohan Xu1, Joanna Bowtell2, William R Young2
1Public Health and Sports Sciences Department, University of Exeter, Exeter, EX1 2LU, UK. xx274@exeter.ac.uk.
Scientific reports
|February 12, 2026
まとめ
慢性的な足首不安定症 (CAI) の個人は,特に目を閉じて,片足のバランス中に敵対筋への神経駆動が増加することを示しています. これは,CAI患者における姿勢適応能力の低下を示唆している.
科学分野:
- 神経科学は神経科学である.
- バイオメカニクス バイオメカニクス
- スポーツ医学 スポーツ医学
背景:
- 慢性的な足首不安定 (CAI) は,神経筋肉のコントロールの欠陥と関連しています.
- CAIにおけるユニペダル姿勢における筋肉の協調と一般的な神経入力が果たす役割は十分に理解されていません.
研究 の 目的:
- シングル・レッグ・スタンスのときのCAI個体と健康な対照群の筋肉間の相関性を比較する.
- 筋肉間の相関性と姿勢制御機能の関係を調査する.
主な方法:
- 4つの足首の筋肉 (前足の足首,長足の足首,中頭部,ソレウス) から表面電磁図 (EMG) を記録した.
- 筋肉間のコヘレンスは,目を開いた状態と目閉じた状態で片足でバランスをとる作業中にデルタとベータの周波数帯で分析されました.
- 参加者は,CAIの患者16人と,健康な対照群 (HC) の患者16人を含む.
主要な成果:
- CAIグループは,眼を閉ざした姿勢で特定の筋肉のペア (PL-SOL,PL-GM,SOL-TA) でベータバンドの筋肉間一貫性が高かった.
- この相関性の増加は,CAIにおけるアゴニスト-アンタゴニストの筋肉ペアに対する一般的な皮質脊髄インプットの増加を示唆する.
- より高いベータ帯の相関性は,圧力の中心 (COP) の複雑性の低下と相関しており,姿勢の適応性の低下を示しています.
結論:
- CAIの個人は,目を閉じた姿勢で,アゴニスト-アンタゴニストの足首筋に共通するコルチコスピナルインプットの増加を示します.
- この神経パターンは,姿勢の適応能力の低下と関連しています.
- 将来の研究では,CAI"コッパーズ"を調査し,筋肉間一貫性分析方法を磨く必要があります.
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