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J Comp Physiol A

Title:		Physiology and morphology of descending neurons in pheromone-processing olfactory pathways in the male moth Manduca sexta
Author(s):		Kanzaki R; Arbas EA; Hildebrand JG;
Address:		"Arizona Research Laboratories, Division of Neurobiology, University of Arizona, Tucson 85721"
Journal Title:		J Comp Physiol A
Year:		1991
Volume:		169
Issue:		1
Page Number:		1 - 14
DOI:		10.1007/BF00198168
ISSN/ISBN:
Abstract:		"1. We have characterized the responses and structure of olfactory descending neurons (DNs) that reside in the protocerebrum (PC) of the brain of male sphinx moths Manduca sexta and project toward thoracic ganglia. 2. Excitatory responses of DNs to pheromone blends were of two general types: (a) brief excitation (BE) that recovered to background in less than 1 s after the stimulus, and (b) long-lasting excitation (LLE) that outlasted the stimulus by greater than or equal to 1 s and, in many cases, as long as 30 s. Individual pheromone components were ineffective in eliciting LLE. 3. Some neurons showing LLE also exhibited state-dependent responses to pheromonal stimuli. When such neurons were in a state of low background firing, stimulation with pheromone blend elicited LLE. When they were in a state of LLE, an identical stimulus reduced firing for 5-10 s after which firing gradually increased to the initial higher level. 4. Thirteen stained DNs were reconstructed from serial sections for detailed analysis of their morphology in the brain. DNs exhibiting LLE had neurites concentrated in the lateral accessory lobes (LALs) in the protocerebrum and adjacent neuropil. Most DNs exhibiting only BE to pheromonal stimuli and other DNs showing responses only to visual or mechanosensory stimuli did not have branches in the LALs"
Keywords:		Animals Brain/cytology/physiology Electrophysiology Female Ganglia/cytology/physiology Interneurons/physiology Male Moths/*physiology Neurons/*physiology/ultrastructure Olfactory Pathways/*physiology Pheromones/*physiology Photic Stimulation Physical Stim;
Notes:		"MedlineKanzaki, R Arbas, E A Hildebrand, J G eng DC-00348/DC/NIDCD NIH HHS/ NS-07309/NS/NINDS NIH HHS/ Research Support, U.S. Gov't, P.H.S. Germany 1991/07/01 J Comp Physiol A. 1991 Jul; 169(1):1-14. doi: 10.1007/BF00198168"