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首页> 外文期刊>Proceedings of the Royal Society. Biological sciences >Evidence of a tunable biological spring: elastic energy storage in aponeuroses varies with transverse strain in vivo
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Evidence of a tunable biological spring: elastic energy storage in aponeuroses varies with transverse strain in vivo

机译：可调谐生物弹簧的证据：亚体验中的弹性储能因体内横向菌株而变化

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摘要

Tendinous structures are generally thought of as biological springs that operate with a fixed stiffness, yet recent observations on the mechanical behaviour of aponeuroses (broad, sheet-like tendons) have challenged this general assumption. During in situ contractions, aponeuroses undergo changes in both length and width and changes in aponeuroses width can drive changes in longitudinal stiffness. Here, we explore if changes in aponeuroses width can modulate elastic energy (EE) storage in the longitudinal direction. We tested this idea in vivo by quantifying muscle and aponeuroses mechanical behaviour in the turkey lateral gastrocnemius during landing and jumping, activities that require rapid rates of energy dissipation and generation, respectively. We discovered that when aponeurosis width increased (as opposed to decreased), apparent longitudinal stiffness was 34% higher and the capacity of aponeuroses to store EE when stretched in the longitudinal direction was 15% lower. These data reveal that biaxial loading of aponeuroses allows for variation in tendon stiffness and energy storage for different locomotor behaviours.
机译：肌腱结构通常被认为是用固定刚度操作的生物弹簧，但最近对腱炎的机械行为（宽，片状肌腱）的观察结果攻击这一总体假设。在原位收缩期间，腱膜经历长度和宽度的变化，并且邻近的变化宽度可以驱动纵向刚度的变化。在这里，我们探讨亚体素宽度的变化是否可以在纵向方向上调节弹性能量（EE）储存。我们通过量化土耳其横向腓肠肿大在着陆和跳跃，需要快速能量耗散和产生的活动的肌肉和腱膜机械行为进行了测试这个想法。我们发现，当邻近曲折宽度增加（与降低相反）时，表观纵向刚度为34％，并且当在纵向上拉伸时，逆向储存ee的容量较低为15％。这些数据表明，腱鞘的双轴负载允许不同的运动行为的肌腱刚度和能量存储。

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