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First-night effect on sleep time in dairy cows

In human sleep studies, the probability of discomfort from the electrodes and the change in environment usually results in first-night recordings being discarded. Sleep recordings from the first night in human subjects often differ in amount of REM (rapid eye movement) sleep and the overall sleep ar...

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Autores principales: Ternman, Emma, Pastell, Matti, Hänninen, Laura, Agenäs, Sigrid, Nielsen, Per P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5898734/
https://www.ncbi.nlm.nih.gov/pubmed/29652904
http://dx.doi.org/10.1371/journal.pone.0195593
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author Ternman, Emma
Pastell, Matti
Hänninen, Laura
Agenäs, Sigrid
Nielsen, Per P.
author_facet Ternman, Emma
Pastell, Matti
Hänninen, Laura
Agenäs, Sigrid
Nielsen, Per P.
author_sort Ternman, Emma
collection PubMed
description In human sleep studies, the probability of discomfort from the electrodes and the change in environment usually results in first-night recordings being discarded. Sleep recordings from the first night in human subjects often differ in amount of REM (rapid eye movement) sleep and the overall sleep architecture. This study investigated whether recordings of sleep states in dairy cows also show a first-night effect. Non-invasive electrophysiological recordings were carried out on nine cows of the Swedish Red breed during three consecutive 24-hour periods (recording days 1–3). Overall, cows spent 12.9 ± 1.4 hours awake, 8.2 ± 1 hours ruminating, 57.2 ± 20.3 min drowsing, 44.1 ± 20.2 min in REM sleep and 64.3 ± 38.1 min in NREM (non-rapid eye movement) sleep (mean ± SD) and there were no significant differences between recording days in total duration for any of the sleep and awake states. However, the bouts of REM sleep and rumination were longer, and the awake bouts were shorter, at night time compared to daytime, regardless of recording day. The awake bouts also showed an interaction effect with longer bouts at daytime during day 1 compared to daytime on day 3. Data on sleep and awake states recorded in adult dairy cows during three consecutive 24-h periods showed great variation in sleep time between cows, but total time for each state was not significantly affected by recording day. Further and more detailed studies of how sleep architecture is affected by recording day is necessary to fully comprehend the first-night effect in dairy cows.
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spelling pubmed-58987342018-04-27 First-night effect on sleep time in dairy cows Ternman, Emma Pastell, Matti Hänninen, Laura Agenäs, Sigrid Nielsen, Per P. PLoS One Research Article In human sleep studies, the probability of discomfort from the electrodes and the change in environment usually results in first-night recordings being discarded. Sleep recordings from the first night in human subjects often differ in amount of REM (rapid eye movement) sleep and the overall sleep architecture. This study investigated whether recordings of sleep states in dairy cows also show a first-night effect. Non-invasive electrophysiological recordings were carried out on nine cows of the Swedish Red breed during three consecutive 24-hour periods (recording days 1–3). Overall, cows spent 12.9 ± 1.4 hours awake, 8.2 ± 1 hours ruminating, 57.2 ± 20.3 min drowsing, 44.1 ± 20.2 min in REM sleep and 64.3 ± 38.1 min in NREM (non-rapid eye movement) sleep (mean ± SD) and there were no significant differences between recording days in total duration for any of the sleep and awake states. However, the bouts of REM sleep and rumination were longer, and the awake bouts were shorter, at night time compared to daytime, regardless of recording day. The awake bouts also showed an interaction effect with longer bouts at daytime during day 1 compared to daytime on day 3. Data on sleep and awake states recorded in adult dairy cows during three consecutive 24-h periods showed great variation in sleep time between cows, but total time for each state was not significantly affected by recording day. Further and more detailed studies of how sleep architecture is affected by recording day is necessary to fully comprehend the first-night effect in dairy cows. Public Library of Science 2018-04-13 /pmc/articles/PMC5898734/ /pubmed/29652904 http://dx.doi.org/10.1371/journal.pone.0195593 Text en © 2018 Ternman et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Ternman, Emma
Pastell, Matti
Hänninen, Laura
Agenäs, Sigrid
Nielsen, Per P.
First-night effect on sleep time in dairy cows
title First-night effect on sleep time in dairy cows
title_full First-night effect on sleep time in dairy cows
title_fullStr First-night effect on sleep time in dairy cows
title_full_unstemmed First-night effect on sleep time in dairy cows
title_short First-night effect on sleep time in dairy cows
title_sort first-night effect on sleep time in dairy cows
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5898734/
https://www.ncbi.nlm.nih.gov/pubmed/29652904
http://dx.doi.org/10.1371/journal.pone.0195593
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