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相关概念视频

Cross-bridge Cycle01:26

Cross-bridge Cycle

As muscle contracts, the overlap between the thin and thick filaments increases, decreasing the length of the sarcomere—the contractile unit of the muscle—using energy in the form of ATP. At the molecular level, this is a cyclic, multistep process that involves binding and hydrolysis of ATP, and movement of actin by myosin.

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相关实验视频

Updated: Jun 26, 2026

An Instrumented Pull Test to Characterize Postural Responses
12:18

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站在高架平台上改变了手臂运动期间的姿势反应反应反应.

Luis Mochizuki1,2, Juliana Pennone1,2, Aline Bigongiari1

  • 1School of Arts, Science and Humanities, University of São Paulo, São Paulo 03828-000, Brazil.

Brain sciences
|October 25, 2024
PubMed
概括
此摘要是机器生成的。

姿势肌肉活动在运动阶段之间发生变化,对高架平台的要求更高. 感官和运动条件显著影响身体如何调整姿势.

关键词:
在EMGEMGEMGEMGEMGEMGEMGEMGEMGEM害怕跌倒,因为害怕跌倒.姿势 姿势 姿势 姿势

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A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance
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相关实验视频

Last Updated: Jun 26, 2026

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科学领域:

  • 生物力学 生物力学
  • 发动机控制器的控制器
  • 人体生理学 人体生理学

背景情况:

  • 姿势调整对于稳定的运动至关重要.
  • 了解预期性 (APA),在线 (OPA) 和补偿性 (CPA) 姿势调整是关键.
  • 感官反和支的基础影响着姿势控制.

研究的目的:

  • 在抬起手臂时调查姿势调整.
  • 分析减少感官信息 (闭眼) 和增加高度 (平台) 对肌肉活动的影响.
  • 检查 APA,OPA 和 CPA 的阶段.

主要方法:

  • 八名年轻女性进行了快速肩曲.
  • 记录了干部和下肢肌肉的EMG活动.
  • 任务在地面和1米高的平台上站立,用眼睛打开和闭上.

主要成果:

  • 肌肉激活模式在APA,OPA和CPA阶段有所不同.
  • OPA显示了最高的肌肉活动; APA显示最低.
  • 升高的平台增加了APA肌肉激活.
  • 在稳定的条件下,APA和OPA之间的负相关性.

结论:

  • 姿势控制适应感官,运动和认知因素.
  • 增加的姿势需求 (身高) 需要在肌肉协同作用中更大的灵活性.
  • 在不同的条件下观察到的改变肌肉活动模式.