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Specific and Nonuniform Brain States during Cold Perception in Mice.

Authors :
Koorliyil, Haritha
Sitt, Jacobo
Rivals, Isabelle
Yushan Liu
Bertolo, Adrien
Cazzanelli, Silvia
Dizeux, Alexandre
Deffieux, Thomas
Tanter, Mickael
Pezet, Sophie
Source :
Journal of Neuroscience. 3/20/2024, Vol. 44 Issue 12, p1-11. 11p.
Publication Year :
2024

Abstract

The quest to decode the complex supraspinal mechanisms that integrate cutaneous thermal information in the central system is still ongoing. The dorsal horn of the spinal cord is the first hub that encodes thermal input which is then transmitted to brain regions via the spinothalamic and thalamocortical pathways. So far, our knowledge about the strength of the interplay between the brain regions during thermal processing is limited. To address this question, we imaged the brains of adult awake male mice in resting state using functional ultrasound imaging during plantar exposure to constant and varying temperatures. Our study reveals for the first time the following: (1) a dichotomy in the response of the somatomotor-cingulate cortices and the hypothalamus, which was never described before, due to the lack of appropriate tools to study such regions with both good spatial and temporal resolutions. (2) We infer that cingulate areas may be involved in the affective responses to temperature changes. (3) Colder temperatures (ramped down) reinforce the disconnection between the somatomotor-cingulate and hypothalamus networks. (4) Finally, we also confirm the existence in the mouse brain of a brain mode characterized by low cognitive strength present more frequently at resting neutral temperature. The present study points toward the existence of a common hub between somatomotor and cingulate regions, whereas hypothalamus functions are related to a secondary network. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02706474
Volume :
44
Issue :
12
Database :
Academic Search Index
Journal :
Journal of Neuroscience
Publication Type :
Academic Journal
Accession number :
176168753
Full Text :
https://doi.org/10.1523/JNEUROSCI.0909-23.2023