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Activity in a forced desynchrony protocol

Fuhler, Sebastiaan (2018) Activity in a forced desynchrony protocol. Research Project 1, Biomedical Sciences.

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Abstract

In chronobiology, a forced desynchrony (FD) protocol is often used to disentangle the homeostatic and circadian effects on behavioural or psychological parameters that show a 24-hour rhythmic pattern. In this research we looked at the ability of a 3-day FD protocol to disentangle homeostatic and circadian effect, and if the question whether the effect of bright light in rhythmic output parameters is under circadian control. Specifically, we looked at the activity of participants over the course of the protocol and whether circadian time influences activity. Using percentage related cumulative frequency analysis we assessed the activity of participants over the course of the protocol and found there was no change in small, medium and large sized activity, in either light condition. An effect of circadian time on activity registered by a wrist-worn ActiGraph Actiwatch was found under dim light conditions, but not under bright light conditions. We conclude that the 3-day FD protocol can be used to disentangle homeostatic and circadian effects on rhythmic output parameters and that circadian time seems to have an effect on activity under dim light conditions.

Item Type: Thesis (Research Project 1)
Supervisor:
Supervisor nameSupervisor E mail
Dijk, G. vanGertjan.van.Dijk@rug.nl
Degree programme: Biomedical Sciences
Thesis type: Research Project 1
Language: English
Date Deposited: 17 Dec 2018
Last Modified: 18 Dec 2018 15:26
URI: http://fse.studenttheses.ub.rug.nl/id/eprint/18950

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