Evidence map›Paper›PMID 34458993›Full record

Observational studyJournal of anatomy2021

Architectural anatomy of the quadriceps and the relationship with muscle strength: An observational study utilising real-time ultrasound in healthy adults.

Doa El-Ansary, Charlotte J Marshall, Joshua Farragher, Raquel Annoni, Ariane Schwank, James McFarlane, Adam Bryant, Jia Han, Marilyn Webster, Guy Zito and 2 more

Open access · bronzeAbstract readObservational Study
In one paragraph

Observational study in Journal of anatomy, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
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

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 22 citations in OpenAlex.

  1. The role of ultrasound of the quadriceps femoris in people with cystic fibrosis: a systematic review and meta-analysis.Jornal brasileiro de pneumologia : publicacao oficial da Sociedade Brasileira de Pneumologia e Tisilogia · 2026
    Pooled it
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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

12 authors at 7 institutions in 4 countries.

Doa El-AnsaryDepartment of Nursing and Allied Health, School of Health Sciences, Swinburne University of Technology, Hawthorn, Vic, Australia.ORCID 0000-0003-3069-3509
Charlotte J MarshallDepartment of Nursing and Allied Health, School of Health Sciences, Swinburne University of Technology, Hawthorn, Vic, Australia.ORCID 0000-0001-5259-892X
Joshua FarragherDepartment of Nursing and Allied Health, School of Health Sciences, Swinburne University of Technology, Hawthorn, Vic, Australia.ORCID 0000-0003-3282-1834
Raquel AnnoniDepartment of Applied Physiotherapy, Federal University of Triangulo Mineiro, Uberaba, Minas Gerais, Brazil.ORCID 0000-0003-2416-7465
Ariane SchwankInstitute for Physiotherapy, Kantonsspital Winterhur, Winterhur, Switzerland.
James McFarlaneEvado Studios Physiotherapy, Hawthorn, Vic, Australia.
Adam BryantDepartment of Physiotherapy, The University of Melbourne, School of Health Sciences, Melbourne, Vic, Australia.
Jia HanDepartment of Nursing and Allied Health, School of Health Sciences, Swinburne University of Technology, Hawthorn, Vic, Australia.ORCID 0000-0003-3071-420X
Marilyn WebsterDepartment of Physiotherapy, The University of Melbourne, School of Health Sciences, Melbourne, Vic, Australia.
Guy ZitoDepartment of Physiotherapy, The University of Melbourne, School of Health Sciences, Melbourne, Vic, Australia.
Selina ParryDepartment of Physiotherapy, The University of Melbourne, School of Health Sciences, Melbourne, Vic, Australia.
Adrian PranataDepartment of Nursing and Allied Health, School of Health Sciences, Swinburne University of Technology, Hawthorn, Vic, Australia.
The University of Melbourne · AUAustralian Physiotherapy Association · AUKantonsspital Winterthur · CHShanghai University of Sport · CNSwinburne University of Technology · AUUniversidade Federal do Triângulo Mineiro · BRUniversity of Canberra · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Quadriceps atrophy and morphological change is a known phenomenon that can impact significantly on strength and functional performance in patients with acute or chronic presentations conditions. Real-time ultrasound (RTUS) imaging is a noninvasive valid and reliable method of quantifying quadriceps muscle anatomy and architecture. To date, there is a paucity of normative data on the architectural properties of superficial and deep components of the quadriceps muscle group to inform assessment and evaluation of intervention programs. The aims of this study were to (1) quantify the anatomical architectural properties of the quadriceps muscle group (rectus femoris, vastus intermedius, and vastus lateralis) using RTUS in healthy older adults and (2) to determine the relationship between RTUS muscle parameters and measures of quadriceps muscle strength. Thirty middle aged to older males and females (age range 55-79 years; mean age =59.9 ± 7.08 years) were recruited. Quadriceps muscle thickness, cross-sectional area, pennation angle, and echogenicity were measured using RTUS. Quadriceps strength was measured using hand-held dynamometry. For the RTUS-derived quadriceps morphological data, rectus femoris mean results; circumference 9.3 cm; CSA 4.6 cm

Indexed as

Muscle StrengthQuadriceps MuscleAgedFemaleHumansMaleMiddle AgedUltrasonographyechogenicitymuscle architecturemuscle strengthquadricepsultrasound

Identifiers

PMID34458993
PMCPMC8450473
OpenAlexW3198213967

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.