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. 2014 Mar 31;5:125. doi: 10.3389/fphys.2014.00125

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Copyright © 2014 Sakurai, Namiki and Kanzaki.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Combinatorial representation of pheromones in the macroglomerular complex in the antennal lobe. (A–C) The morphologies of projection neurons innervating the cumulus (A), toroid (B), and both subdivisions (C). The dashed line in (A) and (C) links processes that were separated to reveal the structures of branches that overlapped in situ. The dashed circle in (C) indicates the area of calyx of the mushroom body. (D–F). The physiology of the projection neurons innervating the macroglomerular complex. The response properties shown in (D–F) correspond to (A–C), respectively. Changes in the membrane potential in response to 200 ms odor presentation are shown. Bombykol, bombykal, and a combination of the two components were examined. Neurons innervating the toroid or cumulus showed selectivity in their odor-response properties, whereas multiglomerular neurons innervating both the toroid and cumulus responded to all stimuli. Ca, calyx of the mushroom body; D, dorsal; IACT, inner antennocerebral tract; M, medial; MGC, macroglomerular complex; OACT, outer antennocerebral tract; ΔILPC, delta area of the inferior lateral protocerebrum. (modified from Kanzaki et al., 2003).