Evidence map›Paper›PMID 34531693›Full record

ArticleNature and science of sleep2021

Firefighters Have Cerebral Blood Flow Reductions in the Orbitofrontal and Insular Cortices That are Associated with Poor Sleep Quality.

Shinwon Park, Haejin Hong, Rye Young Kim, Jiyoung Ma, Suji Lee, Eunji Ha, Sujung Yoon, Jungyoon Kim

Abstract read
In one paragraph

Article in Nature and science of sleep, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
–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 synthesis or guideline pooled it.

  1. Occupation-Induced Fatigue and Impacts on Emergency First Responders: A Systematic Review.International journal of environmental research and public health · 2023
    Pooled it
  2. Article
  3. Article
  4. Article
  5. Traditional Chinese medicine body constitution and sleep quality.Sleep advances : a journal of the Sleep Research Society · 2025
    Article
  6. Review
  7. Article
  8. Review
  9. Microglia and Sleep Disorders.Advances in neurobiology · 2024
    Review
  10. Article
  11. Article
  12. Review
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

8 authors.

Shinwon Park *Ewha Brain Institute, Ewha Womans University, Seoul, South Korea.
Haejin Hong *Ewha Brain Institute, Ewha Womans University, Seoul, South Korea.
Rye Young Kim *Ewha Brain Institute, Ewha Womans University, Seoul, South Korea.
Jiyoung MaEwha Brain Institute, Ewha Womans University, Seoul, South Korea.
Suji LeeEwha Brain Institute, Ewha Womans University, Seoul, South Korea.
Eunji HaEwha Brain Institute, Ewha Womans University, Seoul, South Korea.
Sujung YoonEwha Brain Institute, Ewha Womans University, Seoul, South Korea.
Jungyoon KimEwha Brain Institute, Ewha Womans University, Seoul, South Korea.ORCID 0000-0002-6204-5170

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo investigate the cerebral blood flow (CBF) alterations associated with poor sleep quality and memory performance in firefighters. PARTICIPANTS AND

methodsThirty-seven firefighters (the FF group) and 37 non-firefighter controls (the control group) with sleep complaints were enrolled in this study. We performed brain arterial spin labeling perfusion magnetic resonance imaging (MRI) and compared the CBF between the two groups using whole-brain voxel-wise analyses. Self-reported sleep problems and actigraphy-measured sleep parameters, including the sleep efficiency, wake after sleep onset (WASO), total sleep time, and sleep latency, were assessed. Spatial working memory and learning performances were evaluated on the day of the MRI scan.

resultsThe FF group, relative to the control group, had lower CBF in the right hemispheric regions: Middle temporal/lateral occipital, orbitofrontal, and insular cortices. Lower CBF in the right orbitofrontal cortex was linearly associated with poor sleep quality, as indicated by lower sleep efficiency and longer WASO. The CBF of the right insular cortex was also associated with longer WASO. Despite comparable degrees of self-reported sleep problems between the two groups, the FF group had lower sleep efficiency and longer WASO in the actigraphy, and lower spatial working memory and learning performance, relative to the control group. Poor sleep efficiency was linearly associated with lower spatial working memory performance.

conclusionThese results demonstrated an association of poor sleep quality with decreased brain perfusion in the right orbitofrontal and insular cortices, as well as with reduced working memory performance.

Indexed as

arterial spin labelingcerebral blood flowfirefightersperfusion magnetic resonance imagingsleep efficiencywake after sleep onset

Identifiers

PMID34531693
PMCPMC8439978

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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.