Proprioceptive activity of the wing-hinge stretch receptor in Manduca sexta and other atympanate moths: a study of the noctuoid moth ear B cell homologue
Proprioceptive activity of the wing-hinge stretch receptor in Manduca sexta and other atympanate moths: a study of the noctuoid moth ear B cell homologue
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烟草天蛾和其他无鼓室蛾翼铰链拉伸受体的本体感受活性：夜蛾耳 B 细胞同源物的研究
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
J. Fullard
中科院分区：
文献类型：
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作者：
J. Yack;J. Fullard
最近在无鼓室天蛾 Manduca sexta 的翅膀铰链处发现了一个多末端神经元，它作为本体感受器做出反应，监测后翅的升降运动。来自单个受体轴突的细胞外记录证实该细胞是先前周围神经 3N1b1 记录中观察到的自发和定期放电的来源。当机翼升起时，这种强直放电速率随着仰角成比例地增加。当机翼以低频正弦位移时，接收器放电在整个机翼拍打过程中受到调制，在上冲程的顶部稳定增加到最大值，然后在下冲程的底部缓慢减少到最小值。在较高的翅膀拍动频率下，在上冲程顶部附近会发生阶段性的活动爆发，然后在下冲程期间出现一段静默期。在主动、静止飞行过程中对机翼铰链的视频显微镜观察表明，受体受到其外围附着物翼下膜拉伸的刺激。牵张感受器对翅膀运动的敏感性在 4 个鳞翅目家族的代表中得到证实，表明本体感受反应在鳞翅目中广泛存在。讨论了翼铰链受体的功能作用，及其与夜蛾耳 B 细胞和蝗虫翼铰链拉伸受体的同源关系。
A multiterminal neurone, recently identified at the wing-hinge of the atympanate moth Manduca sexta, is shown to respond as a proprioceptor monitoring elevatory movements of the hind wing. Extracellular recordings from the individual receptor axon confirm this cell to be the source of the spontaneous and regular discharge observed in previous recordings of peripheral nerve 3N1b1. When the wing is raised, this tonic discharge rate increases proportionally with the angle of elevation. When the wing is displaced sinusoidally at a low frequency, the receptor discharge is modulated throughout the wing beat, increasing steadily to a maximum at the top of the upstroke, then slowly decreasing to a minimum at the bottom of the downstroke. At higher wing-beat frequencies, a phasic burst of activity occurs near the top of the upstroke, followed by a silent period during the down-stroke. Video-microscopic observations of the wing-hinge during active, stationary flight suggest that the receptor is stimulated by the stretching of its peripheral attachment, the subalar membrane. Stretch receptor sensitivity to wing movement is demonstrated in representatives of 4 lepidopteran families, suggesting that the proprioceptive response is widespread among the Lepidoptera. The functional role of the wing-hinge receptor, and its proposed homologous relationship to both the B cell of the noctuoid moth ear, and the locust wing-hinge stretch receptor are discussed.