Evidence map›Paper›PMID 27503699›Full record

ArticleHuman brain mapping2016

Early changes of brain connectivity in primary open angle glaucoma.

Paolo Frezzotti, Antonio Giorgio, Francesca Toto, Alessandro De Leucio, Nicola De Stefano

Open access · greenAbstract read
In one paragraph

Article in Human brain mapping, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed, 1 pooled it
7.3field-weighted citation impact, top 3% of its field
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

50 citing papers in PubMed, 1 synthesis or guideline pooled it, 91 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Cognitive impairment in glaucoma.Indian journal of ophthalmology · 2026
    Review
  4. Article
  5. Review
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  7. Article
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Diffusion tensor imaging of optic neuropathies: a narrative review.Quantitative imaging in medicine and surgery · 2024
    Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. 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

5 authors at 1 institution in 1 country.

Paolo FrezzottiDepartment of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy.
Antonio GiorgioDepartment of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy.
Francesca TotoDepartment of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy.
Alessandro De LeucioDepartment of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy.
Nicola De StefanoDepartment of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy.
University of Siena · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Our aim was to assess in primary open angle glaucoma (POAG), a major cause of irreversible blindness worldwide, whether diffuse brain changes recently shown in advanced stage can be detected since the early stage. We used multimodal magnetic resonance imaging (MRI) in 57 patients with the three POAG stages and in 29 age-matched normal controls (NC). Voxelwise statistics was performed with nonparametric permutation testing. Compared with NC, disrupted anatomical connectivity (AC) was found in the whole POAG group along the visual pathway and in nonvisual white matter tracts (P < 0.001). Moreover, POAG patients showed decreased functional connectivity (FC) in the visual (P = 0.004) and working memory (P < 0.001) networks whereas an increase occurred in the default mode (P = 0.002) and subcortical (P < 0.001) networks. Altered AC and FC were already present in early POAG (n = 14) in both visual and nonvisual systems (P ≤ 0.01). Only severe POAG (n = 30) showed gray matter atrophy and this mapped on visual cortex (P < 0.001) and hippocampus (P < 0.001). Increasing POAG stage was associated with worsening AC in both visual and nonvisual pathway (P < 0.001), progressive atrophy in the hippocampus and frontal cortex (P < 0.003). Most of the structural and functional alterations within and outside the visual system showed correlation (P < 0.001 to 0.02) with computerized visual field and retinal nerve fiber layer thickness. In conclusion, the complex pathogenesis of POAG includes widespread damage of AC and altered FC within and beyond the visual system since the early disease stage. The association of brain MRI changes with measures of visual severity emphasizes the clinical relevance of our findings. Hum Brain Mapp 37:4581-4596, 2016. © 2016 Wiley Periodicals, Inc.

Indexed as

AtrophyBrainBrain MappingDiffusion Tensor ImagingDisease ProgressionFemaleGlaucoma, Open-AngleGray MatterHumansMagnetic Resonance ImagingMaleMiddle AgedMultimodal ImagingNeural PathwaysRestTomography, Optical CoherenceAlzheimer diseaseatrophyconnectivityDTIfunctional magnetic resonance imagingglaucomamagnetic resonance imagingneurodegeneration

Identifiers

PMID27503699
PMCPMC6867307
OpenAlexW2475908378

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.