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Living Without Temporal Cues: A Case Study

Bonmati-Carrion, Maria-Angeles, Revell, Victoria, Cook, Tom J., Welch, Thomas R.E, Rol, Maria-Angeles, Skene, Debra and Madrid, Juan Antonio (2020) Living Without Temporal Cues: A Case Study Frontiers in Physiology.

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Abstract

Isolation from external time cues allows endogenous circadian rhythmicity to be demonstrated. In this study, also filmed as a television documentary, we assessed rhythmic changes in a healthy man time isolated in a bunker for 9 days/nights. During this period the lighting conditions were varied between: (1) self-selected light/dark cycle, (2) constant dim light, and (3) light/dark cycle with early wake up. A range of variables was assessed and related to the sleep-wake cycle, psychomotor and physical performance and clock-time estimation. This case study using modern non-invasive monitoring techniques emphasizes how different physiological circadian rhythms persist in temporal isolation under constant dim light conditions with different waveforms, free-running with a period (t) between 24 and 25 h. In addition, a significant correlation between time estimation and mid-sleep time, a proxy for circadian phase, was demonstrated.

Item Type: Article
Divisions : Faculty of Health and Medical Sciences > School of Biosciences and Medicine
Authors :
NameEmailORCID
Bonmati-Carrion, Maria-Angeles
Revell, VictoriaV.Revell@surrey.ac.uk
Cook, Tom J.
Welch, Thomas R.E
Rol, Maria-Angeles
Skene, DebraD.Skene@surrey.ac.uk
Madrid, Juan Antonio
Date : 10 January 2020
Funders : Ministry of Economy and Competitiveness
OA Location : https://www.frontiersin.org/articles/10.3389/fphys.2020.00011/full?&utm_source=Email_to_authors_&utm_medium=Email&utm_content=T1_11.5e1_author&utm_campaign=Email_publication&field=&journalName=Frontiers_in_Physiology&id=496522
Copyright Disclaimer : Copyright © 2020 Bonmati-Carrion, Revell, Cook, Welch, Rol, Skene and Madrid.
Uncontrolled Keywords : circadian, time isolation, wrist temperature, mid-sleep, performance, phase advanced, dim light, clock-time estimation
Depositing User : James Marshall
Date Deposited : 07 Feb 2020 16:12
Last Modified : 07 Feb 2020 16:12
URI: http://epubs.surrey.ac.uk/id/eprint/853695

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