Interhemispheric asymmetry during NREM sleep in the dog

Abstract Functional hemispheric asymmetry was evidenced in many species during sleep. Dogs seem to show hemispheric asymmetry during wakefulness; however, their asymmetric neural activity during sleep was not yet explored. The present study investigated interhemispheric asymmetry in family dogs usin...

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Autores principales:	Vivien Reicher, Anna Kis, Péter Simor, Róbert Bódizs, Márta Gácsi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/733429ffdd8a4e3fb93a7ace4e4a9403
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spelling	oai:doaj.org-article:733429ffdd8a4e3fb93a7ace4e4a94032021-12-02T17:27:11ZInterhemispheric asymmetry during NREM sleep in the dog10.1038/s41598-021-98178-32045-2322https://doaj.org/article/733429ffdd8a4e3fb93a7ace4e4a94032021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98178-3https://doaj.org/toc/2045-2322Abstract Functional hemispheric asymmetry was evidenced in many species during sleep. Dogs seem to show hemispheric asymmetry during wakefulness; however, their asymmetric neural activity during sleep was not yet explored. The present study investigated interhemispheric asymmetry in family dogs using non-invasive polysomnography. EEG recordings during 3-h-long afternoon naps were carried out (N = 19) on two occasions at the same location. Hemispheric asymmetry was assessed during NREM sleep, using bilateral EEG channels. To include periods with high homeostatic sleep pressure and to reduce the variance of the time spent in NREM sleep between dogs, the first two sleep cycles were analysed. Left hemispheric predominance of slow frequency range was detected in the first sleep cycle of sleep recording 1, compared to the baseline level of zero asymmetry as well as to the first sleep cycle of sleep recording 2. Regarding the strength of hemispheric asymmetry, we found greater absolute hemispheric asymmetry in the second sleep cycle of sleep recording 1 and 2 in the frequency ranges of alpha, sigma and beta, compared to the first sleep cycle. Differences between sleep recordings and consecutive sleep cycles might be indicative of adaptation-like processes, but do not closely resemble the results described in humans.Vivien ReicherAnna KisPéter SimorRóbert BódizsMárta GácsiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Vivien Reicher Anna Kis Péter Simor Róbert Bódizs Márta Gácsi Interhemispheric asymmetry during NREM sleep in the dog
description	Abstract Functional hemispheric asymmetry was evidenced in many species during sleep. Dogs seem to show hemispheric asymmetry during wakefulness; however, their asymmetric neural activity during sleep was not yet explored. The present study investigated interhemispheric asymmetry in family dogs using non-invasive polysomnography. EEG recordings during 3-h-long afternoon naps were carried out (N = 19) on two occasions at the same location. Hemispheric asymmetry was assessed during NREM sleep, using bilateral EEG channels. To include periods with high homeostatic sleep pressure and to reduce the variance of the time spent in NREM sleep between dogs, the first two sleep cycles were analysed. Left hemispheric predominance of slow frequency range was detected in the first sleep cycle of sleep recording 1, compared to the baseline level of zero asymmetry as well as to the first sleep cycle of sleep recording 2. Regarding the strength of hemispheric asymmetry, we found greater absolute hemispheric asymmetry in the second sleep cycle of sleep recording 1 and 2 in the frequency ranges of alpha, sigma and beta, compared to the first sleep cycle. Differences between sleep recordings and consecutive sleep cycles might be indicative of adaptation-like processes, but do not closely resemble the results described in humans.
format	article
author	Vivien Reicher Anna Kis Péter Simor Róbert Bódizs Márta Gácsi
author_facet	Vivien Reicher Anna Kis Péter Simor Róbert Bódizs Márta Gácsi
author_sort	Vivien Reicher
title	Interhemispheric asymmetry during NREM sleep in the dog
title_short	Interhemispheric asymmetry during NREM sleep in the dog
title_full	Interhemispheric asymmetry during NREM sleep in the dog
title_fullStr	Interhemispheric asymmetry during NREM sleep in the dog
title_full_unstemmed	Interhemispheric asymmetry during NREM sleep in the dog
title_sort	interhemispheric asymmetry during nrem sleep in the dog
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/733429ffdd8a4e3fb93a7ace4e4a9403
work_keys_str_mv	AT vivienreicher interhemisphericasymmetryduringnremsleepinthedog AT annakis interhemisphericasymmetryduringnremsleepinthedog AT petersimor interhemisphericasymmetryduringnremsleepinthedog AT robertbodizs interhemisphericasymmetryduringnremsleepinthedog AT martagacsi interhemisphericasymmetryduringnremsleepinthedog
_version_	1718380796023144448

Interhemispheric asymmetry during NREM sleep in the dog

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