Active control of arousal by a locus coeruleus GABAergic circuit
Name
nihms-1514493.pdf
Description
Accepted version
Size
1.6 MB
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Unknown
Checksum (MD5)
7ba8cf89367dcc62789c544e1db5a06c
Author(s)
Breton-Provencher, Vincent
Sur, Mriganka
Date Issued
2019
Journal
Nature Neuroscience
Publisher
Springer Nature
Version
Author's final manuscript
Abstract
© 2019, The Author(The Author(s), under exclusive licence to Springer Nature America, Inc. Arousal responses linked to locus coeruleus noradrenergic (LC-NA) activity affect cognition. However, the mechanisms that control modes of LC-NA activity remain unknown. Here, we reveal a local population of GABAergic neurons (LC-GABA) capable of modulating LC-NA activity and arousal. Retrograde tracing shows that inputs to LC-GABA and LC-NA neurons arise from similar regions, though a few regions provide differential inputs to one subtype over the other. Recordings in the locus coeruleus demonstrate two modes of LC-GABA responses whereby spiking is either correlated or broadly anticorrelated with LC-NA responses, reflecting anatomically similar and functionally coincident inputs, or differential and non-coincident inputs, to LC-NA and LC-GABA neurons. Coincident inputs control the gain of LC-NA-mediated arousal responses, whereas non-coincident inputs, such as from the prefrontal cortex to the locus coeruleus, alter global arousal levels. These findings demonstrate distinct modes by which an inhibitory locus coeruleus circuit regulates arousal in the brain.
MIT Department
Picower Institute for Learning and Memory
Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1038/S41593-018-0305-Z
