A Neural System that Represents the Association of Odors with Rewarded Outcomes and Promotes Behavioral Engagement.

Cell Reports
Marie A GadziolaDaniel W Wesson

Abstract

Odors are well known to elicit strong emotional and behavioral responses that become strengthened throughout learning, yet the specific cellular systems involved in odor learning and the direct influence of these on behavior are unclear. Here, we investigate the representation of odor-reward associations within two areas recipient of dense olfactory input, the posterior piriform cortex (pPCX) and the olfactory tubercle (OT), using electrophysiological recordings from mice engaged in reward-based learning. Neurons in both regions represent conditioned odors and do so with similar information content, yet the proportion of neurons recruited by conditioned rewarded odors and the magnitudes and durations of their responses are greater in the OT. Using fiber photometry, we find that OT D1-type dopamine-receptor-expressing neurons flexibly represent odors based on reward associations, and using optogenetics, we show that these neurons influence behavioral engagement. These findings contribute to a model whereby OT D1 neurons support odor-guided motivated behaviors.

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Citations

Nov 12, 2020·Journal of Neurophysiology·Katherine N Wright, Daniel W Wesson
Dec 3, 2020·Frontiers in Neural Circuits·Koshi Murata
May 13, 2021·Seminars in Cell & Developmental Biology·Janardhan P BhattaraiMinghong Ma
May 18, 2021·Frontiers in Cellular Neuroscience·Gordon M ShepherdCharles A Greer
Aug 11, 2021·Neuropharmacology·Adam Gordon-Fennell, Garret D Stuber

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