Evidence map›Paper›PMID 28553673›Full record

ArticleJSM biomarkers2017

Fractal Regulation in Temporal Activity Fluctuations: A Biomarker for Circadian Control and Beyond.

Peng Li, Tommy To, Wei-Yin Chiang, Carolina Escobar, Ruud M Buijs, Kun Hu

Abstract read
In one paragraph

Article in JSM biomarkers, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed.

  1. Article
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  11. Fractal regulation and incident Alzheimer's disease in elderly individuals.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2018
    Article
  12. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Peng LiMedical Biodynamics Program, Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, United States.
Tommy ToMedical Biodynamics Program, Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, United States.
Wei-Yin ChiangMedical Biodynamics Program, Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, United States.
Carolina EscobarDepartamento de Anatomía, Facultad de Medicina, Edificio "B" 4° Piso, Universidad Nacional Autónoma de México, Mexico.
Ruud M BuijsDepartamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico.
Kun HuMedical Biodynamics Program, Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, United States.

Funding

Neuropathology for disrupted multiscale activity control in Alzheimer's diseaseR01AG048108 · NIA · BRIGHAM AND WOMEN'S HOSPITAL · PI HU, KUN · 2015 to 2018
$1.6M
Fractal Regulatory Function of the Circadian SystemR00HL102241 · NHLBI · BRIGHAM AND WOMEN'S HOSPITAL · PI HU, KUN · 2012 to 2014
$720k
NHLBI NIH HHS R00 HL102241NIA NIH HHS R01 AG048108
6 · The paper itself

Abstract

Motor activity in humans and other animals possesses fractal temporal fluctuations that co-exists with circadian or daily activity rhythms. The perturbations in fractal activity patterns are often accompanied by altered circadian/daily rhythms. The goal of this study is to test whether fractal regulation in motor activity provides physiological information independent from 24-h/circadian rhythmicity. To achieve the goal, we studied locomotor activity recordings of rats with the lesion of the suprachiasmatic nucleus (SCN) that are known to have diminished circadian/daily activity rhythms and perturbed fractal regulation. By restricting feeding time (i.e., food was only availability in the dark period of the 12h: 12h light-dark cycles), we found that mean activity levels in these animals displayed significant 24-h rhythms. In contrast, the restricted feeding had no influences on the perturbed fractal regulation in these SCN-lesioned animals, i.e., activity fluctuations in these animals remained random over a wide range of time scales from 2-20h. Our results indicate that 24-h rhythm of food availability can restore/improve circadian/daily rhythms in the SCN-lesioned animals but not necessarily improve the disrupted fractal activity regulation in these animals. This study provides clear and direct evidence that fractal activity patterns offer complementary information about motor activity regulation at multiple time scales that is beyond 24-h rhythm control.

Indexed as

Circadian rhythmFood restrictionFractal activity regulationInter-daily stability (IS)Motor activity

Identifiers

PMID28553673
PMCPMC5443249

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.