Reindeer in the Arctic reduce sleep need during rumination
Timing and quantity of sleep depend on a circadian (ca 24-h) rhythm and a specific sleep requirement. 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 (N...
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Cell Press
2023
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Online Access: | https://hdl.handle.net/10037/33347 https://doi.org/10.1016/j.cub.2023.12.012 |
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ftunivtroemsoe:oai:munin.uit.no:10037/33347 2024-04-28T08:04:10+00:00 Reindeer in the Arctic reduce sleep need during rumination Furrer, Melanie Meier, Sara A. Jan, Maxime Franken, Paul Sundset, Monica Alterskjær Brown, Steven A. Wagner, Gabriela Huber, Reto 2023-12-22 https://hdl.handle.net/10037/33347 https://doi.org/10.1016/j.cub.2023.12.012 eng eng Cell Press Current Biology Furrer M, Meier, Jan M, Franken P, Sundset ma, Brown, Wagner G, Huber R. Reindeer in the Arctic reduce sleep need during rumination. Current Biology. 2023;34(2):427-433 FRIDAID 2217810 doi:10.1016/j.cub.2023.12.012 0960-9822 1879-0445 https://hdl.handle.net/10037/33347 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 VDP::Matematikk og naturvitenskap: 400::Basale biofag: 470 VDP::Mathematics and natural scienses: 400::Basic biosciences: 470 Reinsdyr / Reindeer Søvn / Sleep Journal article Tidsskriftartikkel acceptedVersion 2023 ftunivtroemsoe https://doi.org/10.1016/j.cub.2023.12.012 2024-04-09T23:34:20Z Timing and quantity of sleep depend on a circadian (ca 24-h) rhythm and a specific sleep requirement. 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. Circadian rhythms are synchronized by the light-dark cycle but persist under constant conditions. Strikingly, arctic reindeer behavior is arrhythmic during the solstices. Moreover, the Arctic’s extreme seasonal environmental changes cause large variations in overall activity and food intake. 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 (69degreesN) 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 sum- mer 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 Arctic Rangifer tarandus Reinsdyr Tromsø Tundra University of Tromsø: Munin Open Research Archive Current Biology 34 2 427 433.e5 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og naturvitenskap: 400::Basale biofag: 470 VDP::Mathematics and natural scienses: 400::Basic biosciences: 470 Reinsdyr / Reindeer Søvn / Sleep |
spellingShingle |
VDP::Matematikk og naturvitenskap: 400::Basale biofag: 470 VDP::Mathematics and natural scienses: 400::Basic biosciences: 470 Reinsdyr / Reindeer Søvn / Sleep Furrer, Melanie Meier, Sara A. Jan, Maxime Franken, Paul Sundset, Monica Alterskjær Brown, Steven A. Wagner, Gabriela Huber, Reto Reindeer in the Arctic reduce sleep need during rumination |
topic_facet |
VDP::Matematikk og naturvitenskap: 400::Basale biofag: 470 VDP::Mathematics and natural scienses: 400::Basic biosciences: 470 Reinsdyr / Reindeer Søvn / Sleep |
description |
Timing and quantity of sleep depend on a circadian (ca 24-h) rhythm and a specific sleep requirement. 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. Circadian rhythms are synchronized by the light-dark cycle but persist under constant conditions. Strikingly, arctic reindeer behavior is arrhythmic during the solstices. Moreover, the Arctic’s extreme seasonal environmental changes cause large variations in overall activity and food intake. 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 (69degreesN) 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 sum- mer 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 Alterskjær Brown, Steven A. Wagner, Gabriela Huber, Reto |
author_facet |
Furrer, Melanie Meier, Sara A. Jan, Maxime Franken, Paul Sundset, Monica Alterskjær Brown, Steven A. Wagner, Gabriela 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 |
publishDate |
2023 |
url |
https://hdl.handle.net/10037/33347 https://doi.org/10.1016/j.cub.2023.12.012 |
genre |
Arctic Arctic Rangifer tarandus Reinsdyr Tromsø Tundra |
genre_facet |
Arctic Arctic Rangifer tarandus Reinsdyr Tromsø Tundra |
op_relation |
Current Biology Furrer M, Meier, Jan M, Franken P, Sundset ma, Brown, Wagner G, Huber R. Reindeer in the Arctic reduce sleep need during rumination. Current Biology. 2023;34(2):427-433 FRIDAID 2217810 doi:10.1016/j.cub.2023.12.012 0960-9822 1879-0445 https://hdl.handle.net/10037/33347 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.1016/j.cub.2023.12.012 |
container_title |
Current Biology |
container_volume |
34 |
container_issue |
2 |
container_start_page |
427 |
op_container_end_page |
433.e5 |
_version_ |
1797575006261084160 |