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Plos Biology : Segregation of Odor Identity and Intensity During Odor Discrimination in Drosophila Mushroom Body, Volume 5

By Dickson, Barry

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Book Id: WPLBN0003927097
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos Biology : Segregation of Odor Identity and Intensity During Odor Discrimination in Drosophila Mushroom Body, Volume 5  
Author: Dickson, Barry
Volume: Volume 5
Language: English
Subject: Journals, Science, Biology
Collections: Periodicals: Journal and Magazine Collection, PLoS Biology
Historic
Publication Date:
Publisher: Plos

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Dickson, B. (n.d.). Plos Biology : Segregation of Odor Identity and Intensity During Odor Discrimination in Drosophila Mushroom Body, Volume 5. Retrieved from http://netlibrary.net/


Description
Description : Molecular and cellular studies have begun to unravel a neurobiological basis of olfactory processing, which appears conserved among vertebrate and invertebrate species. Studies have shown clearly that experience-dependent coding of odor identity occurs in ‘‘associative’’ olfactory centers (the piriform cortex in mammals and the mushroom body [MB] in insects). What remains unclear, however, is whether associative centers also mediate innate (spontaneous) odor discrimination and how ongoing experience modifies odor discrimination. Here we show in naı¨ve flies that Gaqmediated signaling in MB modulates spontaneous discrimination of odor identity but not odor intensity (concentration). In contrast, experience-dependent modification (conditioning) of both odor identity and intensity occurs in MB exclusively via Gas-mediated signaling. Our data suggest that spontaneous responses to odor identity and odor intensity discrimination are segregated at the MB level, and neural activity from MB further modulates olfactory processing by experience-independent Gaq-dependent encoding of odor identity and by experience-induced Gasdependent encoding of odor intensity and identity.

 

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