Neuromechanical simulation of the locust jump
Neuromechanical simulation of the locust jump
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DOI：
10.1242/jeb.034678
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发表时间：
2010-04-01
影响因子：
2.8
通讯作者：
Edwards, D. H.
中科院分区：
文献类型：
--
作者：
Cofer, D.;Cymbalyuk, G.;Edwards, D. H.
研究了蝗虫踢脚的神经回路和生物力学，以了解它们在控制踢脚和跳跃中的作用。据推测，相同的神经回路和生物力学控制着这两种行为，但这一假设无法用当前的技术进行验证。我们建立了一个神经力学模型来测试这一点，并更好地理解半月过程（SLP）在跳跃动力学中的作用。通过与各种已发表的数据进行比较，对模型的跳跃和踢腿行为进行了测试，并发现可以复制活体动物的结果。这证实了踢脚神经回路可以产生跳跃行为。SLP是一组高度硬化的角质层，可以弯曲以储存能量，以便在踢腿和跳跃时使用。不可能直接测试SLP对跳跃性能的影响，因为它是关节的一个组成部分，试图消除其影响会阻止蝗虫跳跃。仿真结果表明，SLP能显著提高跳跃距离、功率、总能量和跳跃脉冲持续时间。此外，关节的几何形状使SLP力能够在腿部弯曲时辅助腿部弯曲，并在腿部开始伸展时辅助伸直。
The neural circuitry and biomechanics of kicking in locusts have been studied to understand their roles in the control of both kicking and jumping. It has been hypothesized that the same neural circuit and biomechanics governed both behaviors but this hypothesis was not testable with current technology. We built a neuromechanical model to test this and to gain a better understanding of the role of the semi-lunar process (SLP) in jump dynamics. The jumping and kicking behaviors of the model were tested by comparing them with a variety of published data, and were found to reproduce the results from live animals. This confirmed that the kick neural circuitry can produce the jump behavior. The SLP is a set of highly sclerotized bands of cuticle that can be bent to store energy for use during kicking and jumping. It has not been possible to directly test the effects of the SLP on jump performance because it is an integral part of the joint, and attempts to remove its influence prevent the locust from being able to jump. Simulations demonstrated that the SLP can significantly increase jump distance, power, total energy and duration of the jump impulse. In addition, the geometry of the joint enables the SLP force to assist leg flexion when the leg is flexed, and to assist extension once the leg has begun to extend.