Evidence map›Paper›PMID 33791797›Full record

ArticleCerebral cortex (New York, N.Y. : 1991)2021

Age-Related Differences in White Matter: Understanding Tensor-Based Results Using Fixel-Based Analysis.

Shannon Kelley, John Plass, Andrew R Bender, Thad A Polk

Open access · greenAbstract read
In one paragraph

Article in Cerebral cortex (New York, N.Y. : 1991), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
2.1field-weighted citation impact, top 13% 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

19 citing papers in PubMed, 28 citations in OpenAlex.

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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

4 authors at 2 institutions in 1 country.

Shannon KelleyDepartment of Psychology, University of Michigan, Ann Arbor, MI 48109, USA.
John PlassDepartment of Psychology, University of Michigan, Ann Arbor, MI 48109, USA.
Andrew R BenderDepartment of Epidemiology and Biostatistics, Michigan State University, East Lansing, MI 48824, USA.
Thad A PolkDepartment of Psychology, University of Michigan, Ann Arbor, MI 48109, USA.
University of Michigan–Ann Arbor · USMichigan State University · US

Funding

Investigating age-related neural dedifferentiation longitudinally and in Alzheimer’s pathologyR01AG050523 · NIA · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI POLK, THAD A · 2016 to 2025
$5.7M
NIA NIH HHS R01 AG050523
6 · The paper itself

Abstract

Aging is associated with widespread alterations in cerebral white matter (WM). Most prior studies of age differences in WM have used diffusion tensor imaging (DTI), but typical DTI metrics (e.g., fractional anisotropy; FA) can reflect multiple neurobiological features, making interpretation challenging. Here, we used fixel-based analysis (FBA) to investigate age-related WM differences observed using DTI in a sample of 45 older and 25 younger healthy adults. Age-related FA differences were widespread but were strongly associated with differences in multi-fiber complexity (CX), suggesting that they reflected differences in crossing fibers in addition to structural differences in individual fiber segments. FBA also revealed a frontolimbic locus of age-related effects and provided insights into distinct microstructural changes underlying them. Specifically, age differences in fiber density were prominent in fornix, bilateral anterior internal capsule, forceps minor, body of the corpus callosum, and corticospinal tract, while age differences in fiber cross section were largest in cingulum bundle and forceps minor. These results provide novel insights into specific structural differences underlying major WM differences associated with aging.

Indexed as

AdolescentAdultAgedAged, 80 and overAgingAnatomy, Cross-SectionalCerebral CortexDiffusion Tensor ImagingFemaleHumansImage Processing, Computer-AssistedMaleMiddle AgedNerve FibersPyramidal TractsWhite Matteragingdiffusionfixeltensorwhite matter

Identifiers

PMID33791797
PMCPMC8440891
OpenAlexW3145486478

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.