失败的停止暂时抑制了任务无关的肌肉中的电肌图.
Isaiah Mills1, Mitchell Fisher1, Corey George Wadsley1
1Action Control Lab, Department of Human Physiology, University of Oregon, Eugene, Oregon 97403.
eNeuro
|January 14, 2025
概括
选择性行动停止是一种常见的技能,但它可能会干扰其他运动. 这项研究表明,电肌图 (EMG) 可以测量这种运动抑制,即使停止失败.
科学领域:
- 发动机控制器 发动机控制器
- 神经科学是一个神经科学.
- 人类运动科学 人类运动科学
背景情况:
- 选择性地停止计划中的或正在进行中的运动是关键的日常运动技巧.
- 取消动作可能会导致同时进行动作的干扰,可能是由于全球运动抑制.
- 之前的研究使用脑刺激和电肌图 (EMG) 来研究停车期间的皮质运动兴奋性.
研究的目的:
- 为了研究在选择性停止期间的全球运动抑制是否可以通过仅使用EMG进行边缘测量.
- 评估EMG的时间分辨率,以检测这些抑制作用.
- 为了确定EMG是否可以作为停止过程的生理标记.
主要方法:
- 18名参与者进行了两次预测性反应抑制任务.
- 参与者保持了与任务无关的引指最小肌 (ADM) 肌肉的强力收缩.
- 用ADM EMG信号的时间序列分析来检测抑制模式.
主要成果:
- 在失败的停止试验中,在停止信号后150-203毫秒内观察到ADM EMG信号的暂时抑制.
- 这种抑制模式在不同的选择性停止条件 (停止全部,停止左,停止右) 中发生在两只手中.
- 增强肌肉活动被证明对全球运动抑制效应敏感,即使停止失败.
结论:
- 只有EMG可以在选择性停止期间检测全球运动抑制的外周生理标记.
- 这种方法为研究停止过程的动态提供了高时间分辨率.
- 电磁图谱为探测运动抑制的时间过程和程度提供了有价值的工具.
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