Reindeer in the Arctic reduce sleep need during rumination
Timing and quantity of sleep depend on a circadian (∼24-h) rhythm and a specific sleep requirement.1 Sleep curtailment results in a homeostatic rebound of more and deeper sleep, the latter reflected in increased electroencephalographic (EEG) slow-wave activity (SWA) during non-rapid eye movement (NR...
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Cell Press (Elsevier)
2024
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ftunivzuerich:oai:www.zora.uzh.ch:253450 2024-09-15T17:51:02+00:00 Reindeer in the Arctic reduce sleep need during rumination Furrer, Melanie Meier, Sara A Jan, Maxime Franken, Paul Sundset, Monica A Brown, Steven A Wagner, Gabriela C Huber, Reto 2024-01-22 application/pdf https://www.zora.uzh.ch/id/eprint/253450/ https://www.zora.uzh.ch/id/eprint/253450/1/1_s2.0_S0960982223016676_main.pdf https://doi.org/10.5167/uzh-253450 https://doi.org/10.1016/j.cub.2023.12.012 eng eng Cell Press (Elsevier) https://www.zora.uzh.ch/id/eprint/253450/1/1_s2.0_S0960982223016676_main.pdf doi:10.5167/uzh-253450 doi:10.1016/j.cub.2023.12.012 info:pmid/38141616 urn:issn:0960-9822 info:eu-repo/semantics/closedAccess Furrer, Melanie; Meier, Sara A; Jan, Maxime; Franken, Paul; Sundset, Monica A; Brown, Steven A; Wagner, Gabriela C; Huber, Reto (2024). Reindeer in the Arctic reduce sleep need during rumination. Current Biology, 34(2):427-433.e5. Medical Clinic Department of Child and Adolescent Psychiatry Institute of Pharmacology and Toxicology 610 Medicine & health General Agricultural and Biological Sciences General Biochemistry Genetics and Molecular Biology Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2024 ftunivzuerich https://doi.org/10.5167/uzh-25345010.1016/j.cub.2023.12.012 2024-09-04T00:39:08Z Timing and quantity of sleep depend on a circadian (∼24-h) rhythm and a specific sleep requirement.1 Sleep curtailment results in a homeostatic rebound of more and deeper sleep, the latter reflected in increased electroencephalographic (EEG) slow-wave activity (SWA) during non-rapid eye movement (NREM) sleep.2 Circadian rhythms are synchronized by the light-dark cycle but persist under constant conditions.3,4,5 Strikingly, arctic reindeer behavior is arrhythmic during the solstices.6 Moreover, the Arctic's extreme seasonal environmental changes cause large variations in overall activity and food intake.7 We hypothesized that the maintenance of optimal functioning under these extremely fluctuating conditions would require adaptations not only in daily activity patterns but also in the homeostatic regulation of sleep. We studied sleep using non-invasive EEG in four Eurasian tundra reindeer (Rangifer tarandus tarandus) in Tromsø, Norway (69°N) during the fall equinox and both solstices. As expected, sleep-wake rhythms paralleled daily activity distribution, and sleep deprivation resulted in a homeostatic rebound in all seasons. Yet, these sleep rebounds were smaller in summer and fall than in winter. Surprisingly, SWA decreased not only during NREM sleep but also during rumination. Quantitative modeling revealed that sleep pressure decayed at similar rates during the two behavioral states. Finally, reindeer spent less time in NREM sleep the more they ruminated. These results suggest that they can sleep during rumination. The ability to reduce sleep need during rumination—undisturbed phases for both sleep recovery and digestion—might allow for near-constant feeding in the arctic summer. Article in Journal/Newspaper Arctic Rangifer tarandus Tromsø Tundra University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
institution |
Open Polar |
collection |
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Medical Clinic Department of Child and Adolescent Psychiatry Institute of Pharmacology and Toxicology 610 Medicine & health General Agricultural and Biological Sciences General Biochemistry Genetics and Molecular Biology |
spellingShingle |
Medical Clinic Department of Child and Adolescent Psychiatry Institute of Pharmacology and Toxicology 610 Medicine & health General Agricultural and Biological Sciences General Biochemistry Genetics and Molecular Biology Furrer, Melanie Meier, Sara A Jan, Maxime Franken, Paul Sundset, Monica A Brown, Steven A Wagner, Gabriela C Huber, Reto Reindeer in the Arctic reduce sleep need during rumination |
topic_facet |
Medical Clinic Department of Child and Adolescent Psychiatry Institute of Pharmacology and Toxicology 610 Medicine & health General Agricultural and Biological Sciences General Biochemistry Genetics and Molecular Biology |
description |
Timing and quantity of sleep depend on a circadian (∼24-h) rhythm and a specific sleep requirement.1 Sleep curtailment results in a homeostatic rebound of more and deeper sleep, the latter reflected in increased electroencephalographic (EEG) slow-wave activity (SWA) during non-rapid eye movement (NREM) sleep.2 Circadian rhythms are synchronized by the light-dark cycle but persist under constant conditions.3,4,5 Strikingly, arctic reindeer behavior is arrhythmic during the solstices.6 Moreover, the Arctic's extreme seasonal environmental changes cause large variations in overall activity and food intake.7 We hypothesized that the maintenance of optimal functioning under these extremely fluctuating conditions would require adaptations not only in daily activity patterns but also in the homeostatic regulation of sleep. We studied sleep using non-invasive EEG in four Eurasian tundra reindeer (Rangifer tarandus tarandus) in Tromsø, Norway (69°N) during the fall equinox and both solstices. As expected, sleep-wake rhythms paralleled daily activity distribution, and sleep deprivation resulted in a homeostatic rebound in all seasons. Yet, these sleep rebounds were smaller in summer and fall than in winter. Surprisingly, SWA decreased not only during NREM sleep but also during rumination. Quantitative modeling revealed that sleep pressure decayed at similar rates during the two behavioral states. Finally, reindeer spent less time in NREM sleep the more they ruminated. These results suggest that they can sleep during rumination. The ability to reduce sleep need during rumination—undisturbed phases for both sleep recovery and digestion—might allow for near-constant feeding in the arctic summer. |
format |
Article in Journal/Newspaper |
author |
Furrer, Melanie Meier, Sara A Jan, Maxime Franken, Paul Sundset, Monica A Brown, Steven A Wagner, Gabriela C Huber, Reto |
author_facet |
Furrer, Melanie Meier, Sara A Jan, Maxime Franken, Paul Sundset, Monica A Brown, Steven A Wagner, Gabriela C Huber, Reto |
author_sort |
Furrer, Melanie |
title |
Reindeer in the Arctic reduce sleep need during rumination |
title_short |
Reindeer in the Arctic reduce sleep need during rumination |
title_full |
Reindeer in the Arctic reduce sleep need during rumination |
title_fullStr |
Reindeer in the Arctic reduce sleep need during rumination |
title_full_unstemmed |
Reindeer in the Arctic reduce sleep need during rumination |
title_sort |
reindeer in the arctic reduce sleep need during rumination |
publisher |
Cell Press (Elsevier) |
publishDate |
2024 |
url |
https://www.zora.uzh.ch/id/eprint/253450/ https://www.zora.uzh.ch/id/eprint/253450/1/1_s2.0_S0960982223016676_main.pdf https://doi.org/10.5167/uzh-253450 https://doi.org/10.1016/j.cub.2023.12.012 |
genre |
Arctic Rangifer tarandus Tromsø Tundra |
genre_facet |
Arctic Rangifer tarandus Tromsø Tundra |
op_source |
Furrer, Melanie; Meier, Sara A; Jan, Maxime; Franken, Paul; Sundset, Monica A; Brown, Steven A; Wagner, Gabriela C; Huber, Reto (2024). Reindeer in the Arctic reduce sleep need during rumination. Current Biology, 34(2):427-433.e5. |
op_relation |
https://www.zora.uzh.ch/id/eprint/253450/1/1_s2.0_S0960982223016676_main.pdf doi:10.5167/uzh-253450 doi:10.1016/j.cub.2023.12.012 info:pmid/38141616 urn:issn:0960-9822 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.5167/uzh-25345010.1016/j.cub.2023.12.012 |
_version_ |
1810292837291393024 |