CHEMICAL, SENSESSensilla position on antennae influences afferent terminal location in glomeruliNishino, Hiroshia; Mizunami, Makotob Author Information aResearch Institute for Electronic Science, Hokkaido University, Sapporo bGraduate school of Life Science, Tohoku University, Sendai, Japan Correspondence to Hiroshi Nishino, PhD, Research Institute for Electronic Science, Hokkaido University, Sapporo 060-0812, Japan Tel: +81 11 706 2866; e-mail: [email protected] Received 20 July 2007; accepted 17 August 2007 NeuroReport: November 19, 2007 - Volume 18 - Issue 17 - p 1765-1769 doi: 10.1097/WNR.0b013e3282f16d71 Buy Metrics Abstract The spatial distribution of chemosensory afferent terminals within glomeruli, with respect to their peripheral origin, was investigated using differential staining of afferents in the cockroach. In all glomeruli, the axon terminals of afferents originating from the more distal regions of the flagellum tended to occur in the more distal regions of the glomeruli, relative to the axonal entry side. Afferent terminals tend to be spatially separated, on the basis of their circumferential origin on the flagellum, in pheromone-receptive glomerular complexes and posterodorsally located large glomeruli; however, they were randomly scattered in anteroventrally located small glomeruli. These results revealed that the location of afferent terminals strongly reflects the three-dimensional position of their olfactory receptor neurons in pheromone-receptive glomeruli, but the relationship is weaker in other glomeruli. © 2007 Lippincott Williams & Wilkins, Inc.