Circadian Levels of Serum Melatonin and Cortisol in relation to Changes in Mood, Sleep, and Neurocognitive Performance, Spanning a Year of Residence in Antarctica
Background. Altered circadian cortisol and melatonin rhythms in healthy subjects exposed to an extreme polar photoperiod results in changes in mood and sleep, which can influence cognitive performance. Materials and Methods. We assessed the circadian rhythm of 20 subjects who wintered over at Maitri...
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ftpubmed:oai:pubmedcentral.nih.gov:4459120 2023-05-15T14:01:26+02:00 Circadian Levels of Serum Melatonin and Cortisol in relation to Changes in Mood, Sleep, and Neurocognitive Performance, Spanning a Year of Residence in Antarctica Premkumar, Madhumita Sable, Tarulata Dhanwal, Dinesh Dewan, Richa 2013 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4459120/ https://doi.org/10.1155/2013/254090 en eng Hindawi Publishing Corporation http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4459120/ http://dx.doi.org/10.1155/2013/254090 Copyright © 2013 Madhumita Premkumar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. CC-BY Clinical Study Text 2013 ftpubmed https://doi.org/10.1155/2013/254090 2015-08-30T00:06:30Z Background. Altered circadian cortisol and melatonin rhythms in healthy subjects exposed to an extreme polar photoperiod results in changes in mood and sleep, which can influence cognitive performance. Materials and Methods. We assessed the circadian rhythm of 20 subjects who wintered over at Maitri (70°S, 11°E), India's permanent Antarctic station, from November 2010 to December 2011. Serum cortisol and melatonin levels were measured by radioimmunoassay at 8 am, 3 pm, 8 pm, and 2 am in a single day, once each during the polar summer and winter photoperiods. Conventional psychological tests, Depression, Anxiety, and Stress Scale (DASS-42), Epworth Sleepiness Scale (ESS), and a computerized neurocognitive test battery were used to measure mood, sleep, and cognitive performance. Results. The mean scores for DASS42 were higher during midwinter suggesting the presence of “overwintering.” Mean diurnal cortisol levels during summer and winter were comparable, but the levels of melatonin were markedly higher during winter. Higher 8 am melatonin levels were associated with better sleep quality, lower depression scores, and better performance in tasks like attention, visual memory, and arithmetic. Conclusion. Timing of artificial light exposure and usage of melatonin supplements in improving sleep and cognitive performance in expedition teams are of future research interest. Text Antarc* Antarctic Antarctica PubMed Central (PMC) Antarctic Maitri ENVELOPE(11.733,11.733,-70.764,-70.764) Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) Neuroscience Journal 2013 1 10 |
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Clinical Study |
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Clinical Study Premkumar, Madhumita Sable, Tarulata Dhanwal, Dinesh Dewan, Richa Circadian Levels of Serum Melatonin and Cortisol in relation to Changes in Mood, Sleep, and Neurocognitive Performance, Spanning a Year of Residence in Antarctica |
topic_facet |
Clinical Study |
description |
Background. Altered circadian cortisol and melatonin rhythms in healthy subjects exposed to an extreme polar photoperiod results in changes in mood and sleep, which can influence cognitive performance. Materials and Methods. We assessed the circadian rhythm of 20 subjects who wintered over at Maitri (70°S, 11°E), India's permanent Antarctic station, from November 2010 to December 2011. Serum cortisol and melatonin levels were measured by radioimmunoassay at 8 am, 3 pm, 8 pm, and 2 am in a single day, once each during the polar summer and winter photoperiods. Conventional psychological tests, Depression, Anxiety, and Stress Scale (DASS-42), Epworth Sleepiness Scale (ESS), and a computerized neurocognitive test battery were used to measure mood, sleep, and cognitive performance. Results. The mean scores for DASS42 were higher during midwinter suggesting the presence of “overwintering.” Mean diurnal cortisol levels during summer and winter were comparable, but the levels of melatonin were markedly higher during winter. Higher 8 am melatonin levels were associated with better sleep quality, lower depression scores, and better performance in tasks like attention, visual memory, and arithmetic. Conclusion. Timing of artificial light exposure and usage of melatonin supplements in improving sleep and cognitive performance in expedition teams are of future research interest. |
format |
Text |
author |
Premkumar, Madhumita Sable, Tarulata Dhanwal, Dinesh Dewan, Richa |
author_facet |
Premkumar, Madhumita Sable, Tarulata Dhanwal, Dinesh Dewan, Richa |
author_sort |
Premkumar, Madhumita |
title |
Circadian Levels of Serum Melatonin and Cortisol in relation to Changes in Mood, Sleep, and Neurocognitive Performance, Spanning a Year of Residence in Antarctica |
title_short |
Circadian Levels of Serum Melatonin and Cortisol in relation to Changes in Mood, Sleep, and Neurocognitive Performance, Spanning a Year of Residence in Antarctica |
title_full |
Circadian Levels of Serum Melatonin and Cortisol in relation to Changes in Mood, Sleep, and Neurocognitive Performance, Spanning a Year of Residence in Antarctica |
title_fullStr |
Circadian Levels of Serum Melatonin and Cortisol in relation to Changes in Mood, Sleep, and Neurocognitive Performance, Spanning a Year of Residence in Antarctica |
title_full_unstemmed |
Circadian Levels of Serum Melatonin and Cortisol in relation to Changes in Mood, Sleep, and Neurocognitive Performance, Spanning a Year of Residence in Antarctica |
title_sort |
circadian levels of serum melatonin and cortisol in relation to changes in mood, sleep, and neurocognitive performance, spanning a year of residence in antarctica |
publisher |
Hindawi Publishing Corporation |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4459120/ https://doi.org/10.1155/2013/254090 |
long_lat |
ENVELOPE(11.733,11.733,-70.764,-70.764) ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Antarctic Maitri Midwinter |
geographic_facet |
Antarctic Maitri Midwinter |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4459120/ http://dx.doi.org/10.1155/2013/254090 |
op_rights |
Copyright © 2013 Madhumita Premkumar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1155/2013/254090 |
container_title |
Neuroscience Journal |
container_volume |
2013 |
container_start_page |
1 |
op_container_end_page |
10 |
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1766271244325355520 |