Uncovering different masking factors on wrist skin temperature rhythm in free-living subjects.

Most circadian rhythms are controlled by a major pacemaker located in the hypothalamic suprachiasmatic nucleus. Some of these rhythms, called marker rhythms, serve to characterize the timing of the internal temporal order. However, these variables are susceptible to masking effects as the result of...

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Autores principales:	Antonio Martinez-Nicolas, Elisabet Ortiz-Tudela, Maria Angeles Rol, Juan Antonio Madrid
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/287f15d83c2a42ce804d2583523f14ea
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id	oai:doaj.org-article:287f15d83c2a42ce804d2583523f14ea
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spelling	oai:doaj.org-article:287f15d83c2a42ce804d2583523f14ea2021-11-18T07:50:22ZUncovering different masking factors on wrist skin temperature rhythm in free-living subjects.1932-620310.1371/journal.pone.0061142https://doaj.org/article/287f15d83c2a42ce804d2583523f14ea2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23577201/?tool=EBIhttps://doaj.org/toc/1932-6203Most circadian rhythms are controlled by a major pacemaker located in the hypothalamic suprachiasmatic nucleus. Some of these rhythms, called marker rhythms, serve to characterize the timing of the internal temporal order. However, these variables are susceptible to masking effects as the result of activity, body position, light exposure, environmental temperature and sleep. Recently, wrist skin temperature (WT) has been proposed as a new index for evaluating circadian system status. In light of previous evidence suggesting the important relationship between WT and core body temperature regulation, the aim of this work was to purify the WT pattern in order to obtain its endogenous rhythm with the application of multiple demasking procedures. To this end, 103 subjects (18-24 years old) were recruited and their WT, activity, body position, light exposure, environmental temperature and sleep were recorded under free-living conditions for 1 week. WT demasking by categories or intercepts was applied to simulate a "constant routine" protocol (awakening, dim light, recumbent position, low activity and warm environmental temperature). Although the overall circadian pattern of WT was similar regardless of the masking effects, its amplitude was the rhythmic parameter most affected by environmental conditions. The acrophase and mesor were determined to be the most robust parameters for characterizing this rhythm. In addition, a circadian modulation of the masking effect was found for each masking variable. WT rhythm exhibits a strong endogenous component, despite the existence of multiple external influences. This was evidenced by simultaneously eliminating the influence of activity, body position, light exposure, environmental temperature and sleep. We therefore propose that it could be considered a valuable and minimally-invasive means of recording circadian physiology in ambulatory conditions.Antonio Martinez-NicolasElisabet Ortiz-TudelaMaria Angeles RolJuan Antonio MadridPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 4, p e61142 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Antonio Martinez-Nicolas Elisabet Ortiz-Tudela Maria Angeles Rol Juan Antonio Madrid Uncovering different masking factors on wrist skin temperature rhythm in free-living subjects.
description	Most circadian rhythms are controlled by a major pacemaker located in the hypothalamic suprachiasmatic nucleus. Some of these rhythms, called marker rhythms, serve to characterize the timing of the internal temporal order. However, these variables are susceptible to masking effects as the result of activity, body position, light exposure, environmental temperature and sleep. Recently, wrist skin temperature (WT) has been proposed as a new index for evaluating circadian system status. In light of previous evidence suggesting the important relationship between WT and core body temperature regulation, the aim of this work was to purify the WT pattern in order to obtain its endogenous rhythm with the application of multiple demasking procedures. To this end, 103 subjects (18-24 years old) were recruited and their WT, activity, body position, light exposure, environmental temperature and sleep were recorded under free-living conditions for 1 week. WT demasking by categories or intercepts was applied to simulate a "constant routine" protocol (awakening, dim light, recumbent position, low activity and warm environmental temperature). Although the overall circadian pattern of WT was similar regardless of the masking effects, its amplitude was the rhythmic parameter most affected by environmental conditions. The acrophase and mesor were determined to be the most robust parameters for characterizing this rhythm. In addition, a circadian modulation of the masking effect was found for each masking variable. WT rhythm exhibits a strong endogenous component, despite the existence of multiple external influences. This was evidenced by simultaneously eliminating the influence of activity, body position, light exposure, environmental temperature and sleep. We therefore propose that it could be considered a valuable and minimally-invasive means of recording circadian physiology in ambulatory conditions.
format	article
author	Antonio Martinez-Nicolas Elisabet Ortiz-Tudela Maria Angeles Rol Juan Antonio Madrid
author_facet	Antonio Martinez-Nicolas Elisabet Ortiz-Tudela Maria Angeles Rol Juan Antonio Madrid
author_sort	Antonio Martinez-Nicolas
title	Uncovering different masking factors on wrist skin temperature rhythm in free-living subjects.
title_short	Uncovering different masking factors on wrist skin temperature rhythm in free-living subjects.
title_full	Uncovering different masking factors on wrist skin temperature rhythm in free-living subjects.
title_fullStr	Uncovering different masking factors on wrist skin temperature rhythm in free-living subjects.
title_full_unstemmed	Uncovering different masking factors on wrist skin temperature rhythm in free-living subjects.
title_sort	uncovering different masking factors on wrist skin temperature rhythm in free-living subjects.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/287f15d83c2a42ce804d2583523f14ea
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Uncovering different masking factors on wrist skin temperature rhythm in free-living subjects.

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