Distinct projections of two populations of olfactory receptor axons in the antennal lobe of the sphinx moth Manduca sexta.
Distinct projections of two populations of olfactory receptor axons in the antennal lobe of the sphinx moth Manduca sexta.
复制标题
狮身人面像天蛾 Manduca sexta 触角叶中两个嗅觉受体轴突群体的不同投影。
DOI：
10.1093/chemse/20.3.313
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发表时间：
1995
期刊：
影响因子：
3.5
通讯作者：
Hildebrand,JG
中科院分区：
文献类型：
--
作者：
Christensen,TA;Harrow,ID;Cuzzocrea,C;Randolph,PW;Hildebrand,JG
用顺行染色方法显示了六头狮身人面像嗅觉感受器细胞与两种不同类型的触角感受器有关的中枢投射。在两性中，来自性同构的II型毛状感受器(可能还有一些基本的感受器)的感受器轴突投射到同侧触角叶中的球状小球。每个轴突终止于一个小球。轴突从触角的有限区域投射到整个脑叶的小球，反对将触角感受器细胞严格的地形图映射到小球阵列上。男性特有的I型毛状体感受器中性信息素选择性受体细胞的轴突专门投射到性二形大肾小球复合体(MGC)。来自触角背侧感受器的轴突偏向内侧中脑皮质，来自腹侧感受器的轴突偏向外侧中脑皮质。一些受体细胞轴突在到达中脑皮质之前分支，但它们的终末总是局限于中脑皮质的两个主要肾小球分支之一，即卵丘和环状。这些发现证实了关于信息素和非信息素气味的初级传入信息在触角叶中分离，并表明特定的嗅觉感受器细胞和特定的肾小球之间存在功能上的对应。化学。意念20：313-323,1995。
The central projections of olfactory receptor cells associated with two distinct types of antennal sensilla in the sphinx mothManduca sextawere revealed by anterograde staining. In both sexes, receptor axons that arise from sexually isomorphic, type-II trichoid sensilla (and possibly some basiconic sensilla) project to the spheroidal glomeruli in the ipsilateral antennal lobe. Each axon terminates in one glomerulus. Axons from a limited region of the antenna project to glomeruli throughout the lobe, arguing against strict topographic mapping of antennal receptor cells onto the array of glomeruli. Axons of sex-pheromone-selective receptor cells in the male-specific type-I trichoid sensilla project exclusively to the sexually dimorphic macroglomerular complex (MGC). Axons from sensilla on the dorsal surface of the antenna are biased toward the medial MGC and those from ventral sensilla, toward the lateral MGC. Some receptor-cell axons branch before reaching the MGC, but their terminals are always confined to one of the two main glomerular divisions of the MGC, the cumulus and toroid. These findings confirm that primary-afferent information about pheromonal and non-pheromonal odors is segregated in the antennal lobe and suggest that there is a functional correspondence between particular olfactory receptor cells and specific glomeruli. Chem. Senses 20: 313–323, 1995.