Musculoskeletal modelling under an evolutionary perspective: deciphering the role of single muscle regions in closely related insects
Musculoskeletal modelling under an evolutionary perspective: deciphering the role of single muscle regions in closely related insects
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DOI：
10.1098/rsif.2016.0675
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发表时间：
2016-10-01
影响因子：
3.9
通讯作者：
Blanke, Alexander
中科院分区：
文献类型：
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作者：
David, Sina;Funken, Johannes;Blanke, Alexander
昆虫表现出显著的肌肉结构多样性，然而导致这种功能多样性的因素却知之甚少。在这里，我们使用肌肉骨骼模型来了解几种蜻蜓昆虫肌肉的时空活动，并揭示导致特定肌肉结构的潜在机械因素。咬合力具有潜在的系统信号，但绝对咬合力与尺寸无关。肌肉结构和逆动力学表明，肌肉附着的相对面积更大，根尖下肌群的活性更高，是造成这种高咬合力的原因。然而，这种更大的附着区域并不是蜻蜓的进化趋势。此外，我们的反向动态数据表明，在所有研究物种中，最大咬合力很可能并不反映最大肌肉力生产能力。薄薄的头囊和肌肉的附着区很可能限制了下颌肌肉的最大力输出。
Insects show a remarkable diversity of muscle configurations, yet the factors leading to this functional diversity are poorly understood. Here, we use musculoskeletal modelling to understand the spatio-temporal activity of an insect muscle in several dragonfly species and to reveal potential mechanical factors leading to a particular muscle configuration. Bite characteristics potentially show systematic signal, but absolute bite force is not correlated with size. Muscle configuration and inverse dynamics show that the wider relative area of muscle attachment and the higher activity of subapical muscle groups are responsible for this high bite force. This wider attachment area is, however, not an evolutionary trend within dragonflies. Our inverse dynamic data, furthermore, show that maximum bite forces most probably do not reflect maximal muscle force production capability in all studied species. The thin head capsule and the attachment areas of muscles most probably limit the maximum force output of the mandibular muscles.