Activity of the claw retractor muscle in stick insects in wall and ceiling situations
Activity of the claw retractor muscle in stick insects in wall and ceiling situations
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DOI：
10.1242/jeb.051953
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发表时间：
2011-05-01
影响因子：
2.8
通讯作者：
Wolf, Harald
中科院分区：
文献类型：
--
作者：
Busshardt, Philipp;Gorb, Stanislav N.;Wolf, Harald
本文研究了两种竹节虫（Carausiusmorosus和Cuniculinaimpigra）爪缩肌中部的活动。当动物以水平、垂直或倒置的姿势站立在平台的光滑或粗糙表面上时，以及在平台旋转期间，我们进行了肌电图记录。我们记录了强直性和相位性运动单位。无论动物的位置如何，强直单位始终处于活动状态，尖峰频率无显著差异（尽管在平台旋转期间有较高放电频率的趋势）。阶段性单位活跃几乎完全在平台运动。在对比的紧张性单位，我们检测到显着差异的阶段性单位的活动，即，更高的尖峰频率在旋转期间相比，固定相位，特别是旋转到“更尴尬”的位置。对这两个物种的比较显示，尽管动物的跗骨附着结构存在差异，但肌肉活动没有差异。当比较两个物种在光滑和粗糙表面上的肌肉活动时，情况也是如此。
The activity of the middle part of the claw retractor muscle was examined in two species of stick insects (Carausius morosus and Cuniculina impigra). We performed electromyographic recordings while the animals were standing on a smooth or a rough surface of a platform in horizontal, vertical or inverted positions, as well as during rotations of the platform. We recorded tonic and phasic motor units. The tonic units were active all the time without significant differences in spike frequency, regardless of the position of the animals (although there was a tendency for higher discharge frequencies to occur during platform rotations). The phasic units were active almost exclusively during platform movement. In contrast to the tonic units, we detected significant differences in the activities of the phasic units; namely, higher spike frequencies during rotations compared with the stationary phases, especially for rotations into 'more awkward' positions. A comparison of the two species revealed no difference in muscle activity, despite differences in the animals' tarsal attachment structures. The same was true when comparing the muscle activity of the two species on both the smooth and the rough surfaces.