维持肌肉的意志激活会改变皮层处理来自脚关节的自感性 afference
Alessandra Giangrande1, Toni Mujunen2, Giacinto Luigi Cerone3
1Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland; Laboratory of Neuromuscular System and Rehabilitation Engineering, Department of Electronics and Telecommunications, Politecnico di Torino, Turin, Italy.
Neuroscience
|October 2, 2024
概括
意志肌肉激活增强皮质对被动脚运动的处理,增加神经反应和减少抑制. 这表明活跃的任务调节从外围到中心水平的自身感知.
科学领域:
- 神经科学是一个神经科学.
- 发动机控制器的控制器
- 身体上的感觉 (somatosensation) 是一种感觉.
背景情况:
- 皮质自身感受对运动控制至关重要,可以使用脑电图 (EEG) 对体感刺激的反应进行研究.
- 持续的意志肌肉激活对被动关节运动的自感性皮质处理的影响仍然在很大程度上未被探索.
研究的目的:
- 研究持续的意志肌肉激活如何调节被动脚关节旋转的皮质处理.
- 为了比较电脑电图 (EEG) 响应在被动和主动条件下的脚亲感.
主要方法:
- 25名健康的志愿者在两个条件下进行了被动脚关节旋转:放松 (被动) 和恒定的脚下屈曲扭矩 (主动).
- 同时收集了脑电图 (EEG),心电图 (EMG) 和运动数据.
- 对唤起和诱导EEG反应的时空特征进行了分析,以评估皮质处理调制.
主要成果:
- 与被动状态相比,主动状态显示出明显更大的唤起反应 (∼26%) 和贝塔频段抑制幅度 (∼38%) 在初级感觉运动皮质上.
- 活跃条件表现出较弱的贝塔频段反弹幅度 (∼42%) 超过主传感运动皮质.
- 在主动和被动条件之间没有观察到响应延迟的显著差异.
结论:
- 积极的意志运动任务增强皮质激活,减少皮质抑制在脚的自感刺激期间.
- 这些调制可能涉及周围和中枢神经系统水平的复杂机制,包括脊柱,亚皮质和皮质通路.
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