Muscle Fatigue in the Latch-Mediated Spring Actuated Mandibles of Trap-Jaw Ants
Muscle Fatigue in the Latch-Mediated Spring Actuated Mandibles of Trap-Jaw Ants
复制标题
陷阱颌蚂蚁闩锁介导的弹簧驱动下颌的肌肉疲劳
DOI：
10.1093/icb/icac091
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发表时间：
2022
影响因子：
2.6
通讯作者：
Suarez, Andrew V.
中科院分区：
文献类型：
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作者：
Larabee, Fredrick J.;Gibson, Josh C.;Rivera, Michael D.;Anderson, Philip S. L.;Suarez, Andrew V.
肌肉疲劳会降低表现，潜在地影响生物体的健康。然而，疲劳的某些方面可以通过采用闩锁介导的弹簧驱动(Lamsa)系统来克服，在该系统中，肌肉活动与运动分离。我们估计了肌肉疲劳对六种蚂蚁下颌性能的不同方面的影响，其中两种蚂蚁的下颌骨由肌肉直接驱动，四种蚂蚁的下颌骨呈圈套状。我们发现有证据表明，夹爪蚂蚁的Lamsa系统可以防止某些方面的性能随着重复使用而下降，包括持续时间、加速度和峰值速度。然而，随着重复打击的增加，打击间的间隔增加，这表明肌肉疲劳在弹簧加载阶段仍然起作用。相比之下，一种直接驱动下颌的物种显示出咬合力随着时间的推移而下降。这些结果对旨在最小化疲劳对弹簧和电机驱动系统性能的影响的设计原则具有一定的指导意义。
Muscle fatigue can reduce performance potentially affecting an organism's fitness. However, some aspects of fatigue could be overcome by employing a latch-mediated spring actuated (LaMSA) system where muscle activity is decoupled from movement. We estimated the effects of muscle fatigue on different aspects of mandible performance in six species of ants, two whose mandibles are directly actuated by muscles and four that have LaMSA “trap-jaw” mandibles. We found evidence that the LaMSA system of trap-jaw ants may prevent some aspects of performance from declining with repeated use, including duration, acceleration, and peak velocity. However, inter-strike interval increased with repeated strikes suggesting that muscle fatigue still comes into play during the spring loading phase. In contrast, one species with directly actuated mandibles showed a decline in bite force over time. These results have implications for design principles aimed at minimizing the effects of fatigue on performance in spring and motor actuated systems.