Shani-Narkiss, Haran;
Beniaguev, David;
Segev, Idan;
Mizrahi, Adi;
(2023)
Stability and flexibility of odor representations in the mouse olfactory bulb.
Frontiers in Neural Circuits
, 17
, Article 1157259. 10.3389/fncir.2023.1157259.
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Abstract
Dynamic changes in sensory representations have been basic tenants of studies in neural coding and plasticity. In olfaction, relatively little is known about the dynamic range of changes in odor representations under different brain states and over time. Here, we used time-lapse in vivo two-photon calcium imaging to describe changes in odor representation by mitral cells, the output neurons of the mouse olfactory bulb. Using anesthetics as a gross manipulation to switch between different brain states (wakefulness and under anesthesia), we found that odor representations by mitral cells undergo significant re-shaping across states but not over time within state. Odor representations were well balanced across the population in the awake state yet highly diverse under anesthesia. To evaluate differences in odor representation across states, we used linear classifiers to decode odor identity in one state based on training data from the other state. Decoding across states resulted in nearly chance-level accuracy. In contrast, repeating the same procedure for data recorded within the same state but in different time points, showed that time had a rather minor impact on odor representations. Relative to the differences across states, odor representations remained stable over months. Thus, single mitral cells can change dynamically across states but maintain robust representations across months. These findings have implications for sensory coding and plasticity in the mammalian brain.
| Type: | Article |
|---|---|
| Title: | Stability and flexibility of odor representations in the mouse olfactory bulb |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3389/fncir.2023.1157259 |
| Publisher version: | https://doi.org/10.3389/fncir.2023.1157259 |
| Language: | English |
| Additional information: | Copyright © 2023 Shani-Narkiss, Beniaguev, Segev and Mizrahi. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) (http://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
| Keywords: | odor representations, mitral cells, two-photon imaging, mice, plasticity, anesthesia, stability |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > The Sainsbury Wellcome Centre |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10192632 |
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