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Chem Senses

Title:		"Morphological and physiological characteristics of the serotonin-immunoreactive neuron in the antennal lobe of the male oriental tobacco budworm, Helicoverpa assulta"
Author(s):		Zhao XC; Berg BG;
Address:		"Department of Psychology/Neuroscience Unit, MTFS, Norwegian University of Science and Technology (NTNU), Trondheim, Norway"
Journal Title:		Chem Senses
Year:		2009
Volume:		20090320
Issue:		5
Page Number:		363 - 372
DOI:		10.1093/chemse/bjp013
ISSN/ISBN:		1464-3553 (Electronic) 0379-864X (Print) 0379-864X (Linking)
Abstract:		"We have characterized, by intracellular recording and staining combined with immunocytochemistry, a serotonin-immunoreactive neuron in the central olfactory pathway of the male moth Helicoverpa assulta. The neuron joins the unique category of so-called SI antennal-lobe neurons, previously described in several insect species. In similarity with that originally discovered in the sphinx moth Manduca sexta, the neuron identified here has a large soma located posteriorly in the lateral cell cluster of the antennal lobe and an unbranched neurite projecting into the ipsilateral protocerebrum via the inner antennocerebral tract. After bypassing the central body, the axon crosses the midline and extends through the corresponding antennocerebral tract to the contralateral antennal lobe where it innervates the entire assembly of glomeruli including the male-specific macroglomerular complex. The neuron arborizes into several fine branches in bilateral protocerebral regions anterior to the calyces of the mushroom bodies, particularly on the contralateral side. The physiology of the neuron revealed 2 distinctly different spiking amplitudes, 1 small showing a relatively high spontaneous activity and 1 large showing low activity. The small-amplitude spikes displayed increased frequency when pheromones and plant odors were blown over the antenna. The large-amplitude spikes, which had an unusually long duration, showed no observable responses"
Keywords:		"Animals Biogenic Amines/metabolism Male Microscopy, Confocal Moths/anatomy & histology/*cytology Neurons/immunology/*physiology/ultrastructure Olfactory Pathways Serotonin/*analysis/immunology;"
Notes:		"MedlineZhao, Xin Cheng Berg, Bente Gunnveig eng Research Support, Non-U.S. Gov't England 2009/03/24 Chem Senses. 2009 Jun; 34(5):363-72. doi: 10.1093/chemse/bjp013. Epub 2009 Mar 20"