Evidence map›Paper›PMID 29350554›Full record

ArticleJournal of athletic training2018

Quadriceps Neuromuscular Function and Jump-Landing Sagittal-Plane Knee Biomechanics After Anterior Cruciate Ligament Reconstruction.

Sarah H Ward, J Troy Blackburn, Darin A Padua, Laura E Stanley, Matthew S Harkey, Brittney A Luc-Harkey, Brian Pietrosimone

Open access · diamondAbstract read
In one paragraph

Article in Journal of athletic training, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 4 pooled it
8.5field-weighted citation impact, top 2% 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

36 citing papers in PubMed, 4 syntheses or guidelines pooled it, 74 citations in OpenAlex.

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  6. Functional rehabilitation strategies for enhancing neuromuscular control after ACL reconstruction: A systematic review.Hong Kong physiotherapy journal : official publication of the Hong Kong Physiotherapy Association Limited = Wu li chih liao · 2026
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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

7 authors at 2 institutions in 2 countries.

Sarah H WardDepartment of Physiotherapy, Centre for Health Exercise and Sports Medicine, University of Melbourne, Australia.
J Troy BlackburnDepartment of Exercise and Sport Science, University of North Carolina at Chapel Hill.
Darin A PaduaDepartment of Exercise and Sport Science, University of North Carolina at Chapel Hill.
Laura E StanleyDepartment of Exercise and Sport Science, University of North Carolina at Chapel Hill.
Matthew S HarkeyDepartment of Exercise and Sport Science, University of North Carolina at Chapel Hill.
Brittney A Luc-HarkeyDepartment of Exercise and Sport Science, University of North Carolina at Chapel Hill.
Brian PietrosimoneDepartment of Exercise and Sport Science, University of North Carolina at Chapel Hill.
University of North Carolina at Chapel Hill · USUniversity of Melbourne · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

contextAberrant biomechanics may affect force attenuation at the knee during dynamic activities, potentially increasing the risk of sustaining a knee injury or hastening the development of osteoarthritis after anterior cruciate ligament reconstruction (ACLR). Impaired quadriceps neuromuscular function has been hypothesized to influence the development of aberrant biomechanics.

objectiveTo determine the association between quadriceps neuromuscular function (strength, voluntary activation, and spinal-reflex and corticomotor excitability) and sagittal-plane knee biomechanics during jump landings in individuals with ACLR.

designCross-sectional study.

settingResearch laboratory. PATIENTS OR OTHER

participantsTwenty-eight individuals with unilateral ACLR (7 men, 21 women; age = 22.4 ± 3.7 years, height = 1.69 ± 0.10 m, mass = 69.4 ± 10.1 kg, time postsurgery = 52 ± 42 months). MAIN OUTCOME MEASURE(S): We quantified quadriceps spinal-reflex excitability via the Hoffmann reflex normalized to maximal muscle response (H : M ratio), corticomotor excitability via active motor threshold, strength as knee-extension maximal voluntary isometric contraction (MVIC), and voluntary activation using the central activation ratio (CAR). In a separate session, sagittal-plane kinetics (peak vertical ground reaction force [vGRF] and peak internal knee-extension moment) and kinematics (knee-flexion angle at initial contact, peak knee-flexion angle, and knee-flexion excursion) were collected during the loading phase of a jump-landing task. Separate bivariate associations were performed between the neuromuscular and biomechanical variables.

resultsIn the ACLR limb, greater MVIC was associated with greater peak knee-flexion angle ( r = 0.38, P = .045) and less peak vGRF ( r = -0.41, P = .03). Greater CAR was associated with greater peak internal knee-extension moment (ρ = -0.38, P = .045), and greater H : M ratios were associated with greater peak vGRF ( r = 0.45, P = .02).

conclusionsGreater quadriceps MVIC and CAR may provide better energy attenuation during a jump-landing task. Individuals with greater peak vGRF in the ACLR limb possibly require greater spinal-reflex excitability to attenuate greater loading during dynamic movements.

Indexed as

Anterior Cruciate Ligament ReconstructionQuadriceps MuscleAdultAnterior Cruciate Ligament InjuriesBiomechanical PhenomenaCross-Sectional StudiesFemaleHumansIsometric ContractionKnee JointMaleMovementNeuromuscular JunctionReflexcorticomotor excitabilityground reaction forceknee flexionspinal-reflex excitability

Identifiers

PMID29350554
PMCPMC5842904
OpenAlexW2784962808

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.