Merritt D J, Murphey R K
Morrill Science Center, University of Massachusetts, Amherst 01003.
J Comp Neurol. 1992 Aug 1;322(1):16-34. doi: 10.1002/cne.903220103.
We previously reported a modality-specific layering of leg sensory axons in the CNS of the flies Phormia regina and Drosophila melanogaster with tactile and gustatory axons projecting into a ventral layer and the proprioceptive hair plate axons into an intermediate layer. Here the description is expanded to include the afferent projections of campaniform sensilla on the legs and wings of Phormia. The leg campaniform sensilla produce a number of patterns of projections within an intermediate layer of their ganglion, some of which project intersegmentally into the other thoracic ganglia. One of these patterns is shared by the hair plate sense organs. Selected wing campaniform sensilla were also stained and showed that there is little or no overlap between the projections of leg and wing campaniform sensilla. Similarities with the arrangement of campaniform sensilla and their central processes in Drosophila melanogaster are discussed. To apply the results of this study to a broader range of insects we provide an atlas of the fly CNS and compare it with the locust, which has been the model for much insect neuroanatomy and neurophysiology.
我们之前报道过，在丽蝇和黑腹果蝇的中枢神经系统中，腿部感觉轴突存在特定模态分层，触觉和味觉轴突投射到腹侧层，本体感受毛板轴突投射到中间层。在此，描述范围扩大到包括丽蝇腿部和翅膀上钟形感器的传入投射。腿部钟形感器在其神经节的中间层产生多种投射模式，其中一些模式节间投射到其他胸神经节。毛板感觉器官也具有这些模式中的一种。我们还对选定的翅膀钟形感器进行了染色，结果显示腿部和翅膀钟形感器的投射几乎没有重叠。文中讨论了与黑腹果蝇钟形感器及其中枢神经突排列的相似性。为了将本研究结果应用于更广泛的昆虫种类，我们提供了一份果蝇中枢神经系统图谱，并将其与蝗虫进行比较，蝗虫一直是许多昆虫神经解剖学和神经生理学研究的模型。
