Evidence map›Paper›PMID 27555761›Full record

ArticleInternational journal of chronic obstructive pulmonary disease2016

Alteration of spontaneous brain activity in COPD patients.

Jiaxing Zhang, Ji Chen, Qian Yu, Cunxiu Fan, Ran Zhang, Jianzhong Lin, Tianhe Yang, Ming Fan

Abstract read
In one paragraph

Article in International journal of chronic obstructive pulmonary disease, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing 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

17 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
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  4. Review
  5. Observational
  6. Review
  7. Relationship between Pulmonary Gas Exchange Function and Brain Uptake Dynamics Investigated with HyperpolarizedMagnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine · 2025
    Article
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  16. Article
  17. Disrupted resting-state spontaneous neural activity in stable COPD.International journal of chronic obstructive pulmonary disease
    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

8 authors.

Jiaxing ZhangDepartment of Physiology, Medical College of Xiamen University, Xiangan.
Ji ChenDepartment of Physiology, Medical College of Xiamen University, Xiangan.
Qian YuDepartment of Physiology, Medical College of Xiamen University, Xiangan.
Cunxiu FanDepartment of Physiology, Medical College of Xiamen University, Xiangan.
Ran ZhangDepartment of Physiology, Medical College of Xiamen University, Xiangan.
Jianzhong LinMagnetic Resonance Center, Department of Radiology, Zhongshan Hospital Xiamen University, Xiamen, Fujian.
Tianhe YangMagnetic Resonance Center, Department of Radiology, Zhongshan Hospital Xiamen University, Xiamen, Fujian.
Ming FanDepartment of Cognitive Sciences, Institute of Basic Medical Sciences, Beijing, People's Republic of China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

objectiveAirflow limitation in chronic obstructive pulmonary disease (COPD) results in a decrease in oxygen transport to the brain. The aim of the present study was to explore the alteration of spontaneous brain activity induced by hypoxia in patients with COPD. PATIENTS AND

methodsTwenty-five stable patients with COPD and 25 matching healthy volunteers were investigated. Amplitude of low-frequency fluctuation (ALFF) of blood oxygenation level-dependent signal at resting state in the brain was analyzed using functional magnetic resonance imaging.

resultsWhole-brain analysis using functional magnetic resonance imaging revealed significant decreases in ALFF in the bilateral posterior cingulate gyri and right lingual gyrus and an increase in ALFF in the left postcentral gyrus of patients with COPD. After controlling for SaO2, patients with COPD only showed an increase in ALFF in the left postcentral gyrus. Region of interest analysis showed a decrease in ALFF in the left precentral gyrus and an increase in ALFF in the left caudate nucleus of patients with COPD. In all subjects, ALFF in the bilateral posterior cingulate gyri and right lingual gyrus showed positive correlations with visual reproduction.

conclusionWe demonstrated abnormal spontaneous brain activity of patients with COPD, which may have a pathophysiologic meaning.

Indexed as

Brain WavesAgedAged, 80 and overBiomarkersBrainBrain MappingCase-Control StudiesCerebrovascular CirculationFemaleHumansLungMagnetic Resonance ImagingMaleMiddle AgedOxygenPulmonary Disease, Chronic ObstructiveBiomarkersOxygenchronic obstructive pulmonary diseasehypoxialow-frequency fluctuationneuronal activityresting-state fMRI

Identifiers

PMID27555761
PMCPMC4968669

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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.