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Evidence for Internal Desynchrony Caused by Circadian Clock Resetting
Shannon K Nicholls1, Leandro P Casiraghi2, Wanqi Wang3
1Neuroscience Program, Smith College, Northampton, MA.
Circadian disruption may cause internal desynchrony, where biological rhythms become misaligned. This review finds evidence that resetting the circadian system, particularly with light, can lead to internal desynchrony.
Area of Science:
- Chronobiology
- Molecular Biology
- Physiology
Background:
- Circadian disruption is linked to adverse health outcomes in humans and animals.
- A leading hypothesis suggests internal desynchrony, or misalignment of biological rhythms, underlies these negative effects.
- Internal desynchrony arises from altered phase relationships between rhythms in different body parts.
Purpose of the Study:
- To review the evidence for internal desynchrony caused by circadian clock resetting.
- To investigate the association between circadian resetting protocols and internal desynchrony.
Main Methods:
- Literature review focusing on studies of gene expression in laboratory rodents.
- Analysis of research examining light-induced circadian clock resetting.
Main Results:
- Evidence strongly supports the link between certain light-induced circadian resetting protocols and internal desynchrony.
- Specific gene expression patterns in rodents indicate rhythm misalignment following resetting.
Conclusions:
- Current research provides robust support for the association between circadian resetting and internal desynchrony.
- Further investigation is needed to determine if internal desynchrony is a necessary or sufficient cause of negative health impacts from circadian disruption.
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