Sociality Affects REM Sleep Episode Duration Under Controlled Laboratory Conditions in the Rock Hyrax, Procavia capensis
The rock hyrax, Procavia capensis, is a highly social, diurnal mammal. In the current study several physiologically measurable parameters of sleep, as well as the accompanying behavior, were recorded continuously from five rock hyraxes, for 72 h under solitary (experimental animal alone in the recor...
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doaj-fec1df975a7140ecb40d12e46419b1542020-11-24T22:54:17ZengFrontiers Media S.A.Frontiers in Neuroanatomy1662-51292017-11-011110.3389/fnana.2017.00105297586Sociality Affects REM Sleep Episode Duration Under Controlled Laboratory Conditions in the Rock Hyrax, Procavia capensisNadine Gravett0Adhil Bhagwandin1Oleg I. Lyamin2Oleg I. Lyamin3Jerome M. Siegel4Jerome M. Siegel5Paul R. Manger6School of Anatomical Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South AfricaSchool of Anatomical Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South AfricaDepartment of Psychiatry, School of Medicine, University of California, Los Angeles, Los Angeles, CA, United StatesBrain Research Institute, Neurobiology Research, Sepulveda VA Medical Centre, Los Angeles, CA, United StatesDepartment of Psychiatry, School of Medicine, University of California, Los Angeles, Los Angeles, CA, United StatesBrain Research Institute, Neurobiology Research, Sepulveda VA Medical Centre, Los Angeles, CA, United StatesSchool of Anatomical Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South AfricaThe rock hyrax, Procavia capensis, is a highly social, diurnal mammal. In the current study several physiologically measurable parameters of sleep, as well as the accompanying behavior, were recorded continuously from five rock hyraxes, for 72 h under solitary (experimental animal alone in the recording chamber), and social conditions (experimental animal with 1 or 2 additional, non-implanted animals in the recording chamber). The results revealed no significant differences between solitary and social conditions for total sleep times, number of episodes, episode duration or slow wave activity (SWA) for all states examined. The only significant difference observed between social and solitary conditions was the average duration of rapid eye movement (REM) sleep episodes. REM sleep episode duration was on average 20 s and 40 s longer under social conditions daily and during the dark period, respectively. It is hypothesized that the increase in REM sleep episode duration under social conditions could possibly be attributed to improved thermoregulation strategies, however considering the limited sample size and design of the current study further investigations are needed to confirm this finding. Whether the conclusions and the observations made in this study can be generalized to all naturally socially sleeping mammals remains an open question.http://journal.frontiersin.org/article/10.3389/fnana.2017.00105/fullREMNREMSWArock hyraxHyracoideaAfrotheria |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Nadine Gravett Adhil Bhagwandin Oleg I. Lyamin Oleg I. Lyamin Jerome M. Siegel Jerome M. Siegel Paul R. Manger |
spellingShingle |
Nadine Gravett Adhil Bhagwandin Oleg I. Lyamin Oleg I. Lyamin Jerome M. Siegel Jerome M. Siegel Paul R. Manger Sociality Affects REM Sleep Episode Duration Under Controlled Laboratory Conditions in the Rock Hyrax, Procavia capensis Frontiers in Neuroanatomy REM NREM SWA rock hyrax Hyracoidea Afrotheria |
author_facet |
Nadine Gravett Adhil Bhagwandin Oleg I. Lyamin Oleg I. Lyamin Jerome M. Siegel Jerome M. Siegel Paul R. Manger |
author_sort |
Nadine Gravett |
title |
Sociality Affects REM Sleep Episode Duration Under Controlled Laboratory Conditions in the Rock Hyrax, Procavia capensis |
title_short |
Sociality Affects REM Sleep Episode Duration Under Controlled Laboratory Conditions in the Rock Hyrax, Procavia capensis |
title_full |
Sociality Affects REM Sleep Episode Duration Under Controlled Laboratory Conditions in the Rock Hyrax, Procavia capensis |
title_fullStr |
Sociality Affects REM Sleep Episode Duration Under Controlled Laboratory Conditions in the Rock Hyrax, Procavia capensis |
title_full_unstemmed |
Sociality Affects REM Sleep Episode Duration Under Controlled Laboratory Conditions in the Rock Hyrax, Procavia capensis |
title_sort |
sociality affects rem sleep episode duration under controlled laboratory conditions in the rock hyrax, procavia capensis |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Neuroanatomy |
issn |
1662-5129 |
publishDate |
2017-11-01 |
description |
The rock hyrax, Procavia capensis, is a highly social, diurnal mammal. In the current study several physiologically measurable parameters of sleep, as well as the accompanying behavior, were recorded continuously from five rock hyraxes, for 72 h under solitary (experimental animal alone in the recording chamber), and social conditions (experimental animal with 1 or 2 additional, non-implanted animals in the recording chamber). The results revealed no significant differences between solitary and social conditions for total sleep times, number of episodes, episode duration or slow wave activity (SWA) for all states examined. The only significant difference observed between social and solitary conditions was the average duration of rapid eye movement (REM) sleep episodes. REM sleep episode duration was on average 20 s and 40 s longer under social conditions daily and during the dark period, respectively. It is hypothesized that the increase in REM sleep episode duration under social conditions could possibly be attributed to improved thermoregulation strategies, however considering the limited sample size and design of the current study further investigations are needed to confirm this finding. Whether the conclusions and the observations made in this study can be generalized to all naturally socially sleeping mammals remains an open question. |
topic |
REM NREM SWA rock hyrax Hyracoidea Afrotheria |
url |
http://journal.frontiersin.org/article/10.3389/fnana.2017.00105/full |
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