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相关概念视频

Actin Treadmilling01:18

Actin Treadmilling

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Actin filaments undergo polymerization and depolymerization from either end. The polymerization and depolymerization rates depend on the cytosolic concentration of free G-actins. The polymerization rate is generally higher at the plus or barbed end, while the depolymerization rate is higher at the minus or pointed end. At a steady state, critical concentration describes the concentration of free G-actin monomers at which the polymerization rate at the plus end is equal to that of the...
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Using a Split-belt Treadmill to Evaluate Generalization of Human Locomotor Adaptation
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由跑步机速度在步骤内变化引起的四肢间协调的变化.

Brooke L Hall, Ryan T Roemmich, Caitlin L Banks

    bioRxiv : the preprint server for biology
    |December 9, 2024
    PubMed
    概括

    动态跑步机行走改变了四肢间的协调,而"快速"条件显著影响了步态时间和四肢定位. 这凸显了它在不对称人群中进行步行康复的潜力.

    科学领域:

    • 生物力学 生物力学
    • 人类运动科学科学 人类运动科学
    • 步态分析 步态分析

    背景情况:

    • 肢体间协调对于有效的行走至关重要,涉及左腿和右腿的同步运动.
    • 动态跑步机行走,在步行周期中改变跑步机的速度,是一个新的环境,其协调需求尚未完全理解.
    • 在临床人群中评估动态跑步机行走需要先前了解其对健康个体四肢间协调的影响.

    研究的目的:

    • 在健康的年轻成年人中调查动态跑步机行走的肢体间协调要求.
    • 在不同的动态跑步机条件下量化步态协调的变化.
    • 了解动态跑步机行走对于步态康复的潜力.

    主要方法:

    • 十名健康的年轻人参与了这项研究.
    • 使用相位移,振荡中心和振荡中心差异来量化肢体间协调.
    • 参与者在跑步机上行走,速度条件不同 (快,慢,加速,减速).

    主要成果:

    • "快速"动态跑步机条件显著增加了相位转移,表明右腿领先左腿.
    • "快速"条件还导致右腿与左腿相比,右腿的振荡轴更加曲.
    • 动态跑步机行走改变了空间和时间领域的肢体间协调,具体变化因条件而异.

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    Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running
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    Methods to Quantify Pharmacologically Induced Alterations in Motor Function in Human Incomplete SCI
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    结论:

    • 不同的动态跑步机行走协议会导致肢体间协调发生不同程度的变化.
    • 动态跑步机行走是可适应的,允许调整生物力学和协调参数.
    • 这种适应性表明,有可能使用动态跑步机行走来恢复不对称步态的个体的步态对称.