Hibernation in a primate: does sleep occur?
During hibernation, critical physiological processes are downregulated and thermogenically induced arousals are presumably needed periodically to fulfil those physiological demands. Among the processes incompatible with a hypome tabolic state is sleep. However, one hibernating primate, the dwarf lem...
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crroyalsociety:10.1098/rsos.160282 2024-06-23T07:50:43+00:00 Hibernation in a primate: does sleep occur? Blanco, Marina B. Dausmann, Kathrin H. Faherty, Sheena L. Klopfer, Peter Krystal, Andrew D. Schopler, Robert Yoder, Anne D. Margot Marsh Biodiversity Foundation The Duke Institute for Brain Sciences DFG (German Research Foundation 2016 http://dx.doi.org/10.1098/rsos.160282 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.160282 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.160282 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Royal Society Open Science volume 3, issue 8, page 160282 ISSN 2054-5703 journal-article 2016 crroyalsociety https://doi.org/10.1098/rsos.160282 2024-06-04T06:23:08Z During hibernation, critical physiological processes are downregulated and thermogenically induced arousals are presumably needed periodically to fulfil those physiological demands. Among the processes incompatible with a hypome tabolic state is sleep. However, one hibernating primate, the dwarf lemur Cheirogaleus medius , experiences rapid eye movement (REM)-like states during hibernation, whenever passively reaching temperatures above 30°C, as occurs when it hibernates in poorly insulated tree hollows under tropical conditions. Here, we report electroencephalographic (EEG) recordings, temperature data and metabolic rates from two related species ( C. crossleyi and C. sibreei ), inhabiting high-altitude rainforests and hibernating underground, conditions that mirror, to some extent, those experienced by temperate hibernators. We compared the physiology of hibernation and spontaneous arousals in these animals to C. medius , as well as the much more distantly related non-primate hibernators, such as Arctic, golden-mantled and European ground squirrels. We observed a number of commonalities with non-primate temperate hibernators including: (i) monotonous ultra-low voltage EEG during torpor bouts in these relatively cold-weather hibernators, (ii) the absence of sleep during torpor bouts, (iii) the occurrence of spontaneous arousals out of torpor, during which sleep regularly occurred, (iv) relatively high early EEG non-REM during the arousal, and (v) a gradual transition to the torpid EEG state from non-REM sleep. Unlike C. medius , our study species did not display sleep-like states during torpor bouts, but instead exclusively exhibited them during arousals. During these short euthermic periods, non-REM as well as REM sleep-like stages were observed. Differences observed between these two species and their close relative, C. medius , for which data have been published, presumably reflect differences in hibernaculum temperature. Article in Journal/Newspaper Arctic The Royal Society Arctic Royal Society Open Science 3 8 160282 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
During hibernation, critical physiological processes are downregulated and thermogenically induced arousals are presumably needed periodically to fulfil those physiological demands. Among the processes incompatible with a hypome tabolic state is sleep. However, one hibernating primate, the dwarf lemur Cheirogaleus medius , experiences rapid eye movement (REM)-like states during hibernation, whenever passively reaching temperatures above 30°C, as occurs when it hibernates in poorly insulated tree hollows under tropical conditions. Here, we report electroencephalographic (EEG) recordings, temperature data and metabolic rates from two related species ( C. crossleyi and C. sibreei ), inhabiting high-altitude rainforests and hibernating underground, conditions that mirror, to some extent, those experienced by temperate hibernators. We compared the physiology of hibernation and spontaneous arousals in these animals to C. medius , as well as the much more distantly related non-primate hibernators, such as Arctic, golden-mantled and European ground squirrels. We observed a number of commonalities with non-primate temperate hibernators including: (i) monotonous ultra-low voltage EEG during torpor bouts in these relatively cold-weather hibernators, (ii) the absence of sleep during torpor bouts, (iii) the occurrence of spontaneous arousals out of torpor, during which sleep regularly occurred, (iv) relatively high early EEG non-REM during the arousal, and (v) a gradual transition to the torpid EEG state from non-REM sleep. Unlike C. medius , our study species did not display sleep-like states during torpor bouts, but instead exclusively exhibited them during arousals. During these short euthermic periods, non-REM as well as REM sleep-like stages were observed. Differences observed between these two species and their close relative, C. medius , for which data have been published, presumably reflect differences in hibernaculum temperature. |
author2 |
Margot Marsh Biodiversity Foundation The Duke Institute for Brain Sciences DFG (German Research Foundation |
format |
Article in Journal/Newspaper |
author |
Blanco, Marina B. Dausmann, Kathrin H. Faherty, Sheena L. Klopfer, Peter Krystal, Andrew D. Schopler, Robert Yoder, Anne D. |
spellingShingle |
Blanco, Marina B. Dausmann, Kathrin H. Faherty, Sheena L. Klopfer, Peter Krystal, Andrew D. Schopler, Robert Yoder, Anne D. Hibernation in a primate: does sleep occur? |
author_facet |
Blanco, Marina B. Dausmann, Kathrin H. Faherty, Sheena L. Klopfer, Peter Krystal, Andrew D. Schopler, Robert Yoder, Anne D. |
author_sort |
Blanco, Marina B. |
title |
Hibernation in a primate: does sleep occur? |
title_short |
Hibernation in a primate: does sleep occur? |
title_full |
Hibernation in a primate: does sleep occur? |
title_fullStr |
Hibernation in a primate: does sleep occur? |
title_full_unstemmed |
Hibernation in a primate: does sleep occur? |
title_sort |
hibernation in a primate: does sleep occur? |
publisher |
The Royal Society |
publishDate |
2016 |
url |
http://dx.doi.org/10.1098/rsos.160282 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.160282 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.160282 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Royal Society Open Science volume 3, issue 8, page 160282 ISSN 2054-5703 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsos.160282 |
container_title |
Royal Society Open Science |
container_volume |
3 |
container_issue |
8 |
container_start_page |
160282 |
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1802641636050599936 |