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Title of Journal: J Comp Physiol A

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Abbravation: Journal of Comparative Physiology A

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Springer Berlin Heidelberg

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DOI

10.1007/s00415-006-0156-5

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ISSN

1432-1351

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Morphological characterization of the antennal lob

Authors: Paolo Solari Valentina Corda Giorgia Sollai Sabine Kreissl C Giovanni Galizia Roberto Crnjar
Publish Date: 2015/12/12
Volume: 202, Issue: 2, Pages: 131-146
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Abstract

The medfly Ceratitis capitata is one of the most important pests for horticulture worldwide The knowledge about anatomy and function of the medfly olfactory system is still limited The first brain structure to process olfactory information in insects is the antennal lobe AL which is composed of its functional and morphological units the olfactory glomeruli Here we present a morphological threedimensional reconstruction of AL glomeruli in adult brains We used unilateral antennal backfills of olfactory receptor neurons ORNs with neural tracers revealing the AL structure We recorded confocal stacks acquired from wholemount specimens and analyzed them with the software AMIRA The ALs in C capitata are organized in glomeruli which are more tightly packed in the anterior part than the posterior one Axons of ORNs bilaterally connect the ALs through a commissure between the two ALs This commissure is formed by several distinct fascicles Contralateral dye transfer suggests the presence of gap junctions connecting ORNs from both antennae There was no statistical difference between the average volumes of female ALs 204166 ± 12554 μm3 and of male ALs 190287 ± 11823 μm3 In most specimens we counted 53 glomeruli in each AL seven of which were sexually dimorphic in size


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