Central projections of the wing afferents in the hawkmoth, Agrius convolvuli
Central projections of the wing afferents in the hawkmoth, Agrius convolvuli
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DOI：
10.1016/j.jinsphys.2011.08.002
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发表时间：
2011-11-01
影响因子：
2.2
通讯作者：
Kanzaki, Ryohei
中科院分区：
文献类型：
--
作者：
Ando, Noriyasu;Wang, Hao;Kanzaki, Ryohei
各种昆虫的飞行行为与其机械和神经特性密切相关。与蝗虫和苍蝇相比，飞蛾具有“中间”特性，包括神经性肌肉激活，间接肌肉发电和双翼昆虫般的扑翼行为。尽管有这些独特的特征，但对飞蛾飞行控制的神经机制知之甚少。我们调查了预测的翅膀mechanosensory传入的中枢神经系统（CNS）的天蛾，旋花，因为mechanosensory本体感受反馈有一个重要的作用，飞行控制，大概会优化昆虫物种。我们进行了顺行染色的9传入神经从前，后翅。这些传入纤维均投射到胸前、中胸和后胸神经节（TG 1、2和3），并有上行纤维到达头神经节。前翅、后翅和对侧前翅传入神经在TG 1 -3和食管下神经节（SOG）中的突出投射区是共同的，这表明来自不同翅膀的信息在多个水平上会聚，可能是为了协调翅膀拍动。另一方面，前翅和后翅传入神经的投射存在差异，特别是在TG 1的被盖投射区和TGs和SOG的前翅前神经对侧投射区，反映了各翅上相应机械感受器的功能差异。传入包括组的钟形感器在翅膀的基础上有突出的上升途径SOG，类似的头颈部运动系统的苍蝇的凝视控制。双染色的翅膀传入和飞行或颈部运动神经元也表明它们之间的潜在连接。我们的研究结果表明，翅膀本体感受反馈飞行的多个角色，并提供进一步了解飞蛾飞行系统的神经机制的解剖学基础。(C)2011爱思唯尔有限公司保留所有权利。
Flight behaviors in various insect species are closely correlated with their mechanical and neuronal properties. Compared to locusts and flies which have been intensively studied, moths have "intermediate" properties in terms of the neurogenic muscle activations, power generation by indirect muscles, and two-winged-insect-like flapping behavior. Despite these unique characteristics, little is known about the neuronal mechanisms of flight control in moths. We investigated projections of the wing mechanosensory afferents in the central nervous system (CNS) of the hawkmoth, Agrius convolvuli, because the mechanosensory proprioceptive feedback has an essential role for flight control and would be presumably optimized for insect species. We conducted anterograde staining of nine afferent nerves from the fore- and hindwings. All of these afferents projected into the prothoracic, mesothoracic and metathoracic ganglia (TG1, 2 and 3) and had ascending fibers to the head ganglia. Prominent projection areas in the TG1-3 and suboesophageal ganglion (SOG) were common between the forewing, hindwing and contralateral forewing afferents, suggesting that information from different wings are converged at multiple levels presumably for coordinating wing flapping. On the other hand, differences of projections between the fore- and hindwing afferents were observed especially in projection areas of the tegulae in the TG1 and contralateral projections of the anterior forewing nerve in the TGs and SOG, which would reflect functional differences between corresponding mechanoreceptors on each wing. Afferents comprising groups of the campaniform sensilla at the wing bases had prominent ascending pathways to the SOG, resembling the head-neck motor system for gaze control in flies. Double staining of the wing afferents and flight or neck motoneurons also indicated potential connectivity between them. Our results suggest multiple roles of the wing proprioceptive feedback for flight and provide the anatomical basis for further understanding of neuronal mechanisms of the flight system in moths. (C) 2011 Elsevier Ltd. All rights reserved.