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Chem Senses

Title:		Distinct projections of two populations of olfactory receptor axons in the antennal lobe of the sphinx moth Manduca sexta
Author(s):		Christensen TA; Harrow ID; Cuzzocrea C; Randolph PW; Hildebrand JG;
Address:		"Arizona Research Laboratories, Division of Neurobiology, University of Arizona, Tucson 85721, USA"
Journal Title:		Chem Senses
Year:		1995
Volume:		20
Issue:		3
Page Number:		313 - 323
DOI:		10.1093/chemse/20.3.313
ISSN/ISBN:		0379-864X (Print) 0379-864X (Linking)
Abstract:		"The central projections of olfactory receptor cells associated with two distinct types of antennal sensilla in the sphinx moth Manduca sexta were 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"
Keywords:		Animals *Axons Female Male Manduca/*anatomy & histology Olfactory Receptor Neurons/*anatomy & histology Pheromones Sex Attractants Sex Characteristics;
Notes:		"MedlineChristensen, T A Harrow, I D Cuzzocrea, C Randolph, P W Hildebrand, J G eng AI-23253/AI/NIAID NIH HHS/ Comparative Study Research Support, U.S. Gov't, P.H.S. England 1995/06/01 Chem Senses. 1995 Jun; 20(3):313-23. doi: 10.1093/chemse/20.3.313"