Tarsal movements in flies during leg attachment and detachment on a smooth substrate
Tarsal movements in flies during leg attachment and detachment on a smooth substrate
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DOI：
10.1016/s0022-1910(03)00048-9
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发表时间：
2003-06-01
影响因子：
2.2
通讯作者：
Gorb, S
中科院分区：
文献类型：
--
作者：
Niederegger, S;Gorb, S
为了了解苍蝇的附着机制，重要的是要澄清的问题，如何建立和打破的粘附垫（垫）与基板的接触。通过使用正常和高速视频记录，本研究揭示了pulvilli以特定的方式定位在表面上。在腿接触后，爪垫明显地负载或压在基底上，如通过爪的张开所证明的。根据腿（前腿、后腿或后腿）的不同，可以通过四种不同的方式将枕垫从基底上分离：牵拉、移位、扭转和抬起。提升是唯一的分离模式，取决于爪的动作。在腿部准备中研究了跗骨链的运动，其中用镊子牵拉爪屈肌肌腱并记录视频。在附着和分离过程中的跗骨运动的形态学背景进行了研究，通过扫描电子显微镜，荧光显微镜，明场光学显微镜，然后通过一系列的半薄切片的前跗骨结构。当肌腱在牵拉后被释放时，几个弹性蛋白轴承弹簧参与了跗骨节段到其初始位置的反冲。(C)2003爱思唯尔科技有限公司版权所有。
In order to understand the attachment mechanism of flies, it is important to clarify the question of how the adhesive pad (pulvillus) builds and breaks the contact with the substrate. By using normal and high-speed video recordings, the present study revealed that pulvilli are positioned on the surface in a particular way. The pulvilli are apparently loaded or pressed upon the substrate after leg contact, as evidenced by splaying of the claws. Detachment of pulvilli from the substrate may be achieved in four different modes depending on the leg (fore-, mid- or hindleg): pulling, shifting, twisting, and lifting. Lifting is the only detachment mode depending on the claws' action. Kinematics of the tarsal chain is studied in leg preparations, in which the tendon of the claw flexor muscle was pulled by tweezers and video recorded. The morphological background of tarsal movements during attachment and detachment is studied by scanning electron microscopy, fluorescent microscopy, and bright field light microscopy followed by serial semithin sectioning of pretarsal structures. Several resilin-bearing springs are involved in the recoil of the tarsal segments to their initial position, when the tendon is released after pull. (C) 2003 Elsevier Science Ltd. All rights reserved.