Evidence map›Paper›PMID 32348153›Full record

ArticleJournal of athletic training2020

Quadriceps Inhibition After Naturally Occurring Patellar Tendon Damage and Pain.

Steven M Davi, Adam S Lepley, Craig R Denegar, Lindsay J DiStefano, Corey M Edgar, Lindsey K Lepley

Open access · diamondAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Journal of athletic training, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed, 2 pooled it
1.9field-weighted citation impact, top 16% 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

6 citing papers in PubMed, 2 syntheses or guidelines pooled it, 20 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
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  5. Article
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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

6 authors at 3 institutions in 1 country.

Steven M DaviDepartment of Kinesiology, University of Connecticut, Storrs.
Adam S LepleySchool of Kinesiology, University of Michigan, Ann Arbor.
Craig R DenegarDepartment of Kinesiology, University of Connecticut, Storrs.
Lindsay J DiStefanoDepartment of Kinesiology, University of Connecticut, Storrs.
Corey M EdgarUniversity of Connecticut Health Center, Storrs.
Lindsey K LepleySchool of Kinesiology, University of Michigan, Ann Arbor.
University of Connecticut · USUniversity of Michigan–Ann Arbor · USUConn Health · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

contextAfter knee-joint injury, pain, effusion, and mechanoreceptor damage alter afferent signaling, which can result in quadriceps inhibition and subsequent weakness. The individual contributions of each factor to inhibition remain unclear due to confounding knee-joint injuries and indirect experimental models.

objectiveTo characterize the influence of naturally occurring knee damage and pain on quadriceps neuromuscular function in individuals with patellar tendinopathy.

designCross-sectional study.

settingResearch laboratory. PATIENTS OR OTHER

participantsTwenty participants who self-reported patellar tendinopathy (PT) and 10 healthy control individuals underwent ultrasonic tendon assessment. Injured participants were dichotomized by an orthopaedic surgeon into groups with (1) pain and structural tendon abnormality and (2) regional pain alone. MAIN OUTCOME MEASURE(S): Quadriceps inhibition was assessed with the Hoffman reflex and the central activation ratio via the superimposed-burst technique. Normally distributed measures were analyzed using a 1-way analysis of variance and post hoc independent t tests. Kruskal-Wallis tests with post hoc Mann-Whitney U tests were used to analyze nonnormally distributed data. An a priori α level of P ≤ .05 was set.

resultsControl participants presented with more spinal-reflex excitability (0.37 ± 0.23) than the PT (0.10 ± 0.06; P = .03) and regional-pain (0.18 ± 0.05; P = .02) groups. Knee-extension strength was greater in the control (3.37 ± 0.59 Nm/kg) than in the PT (2.41 ± 0.67 Nm/kg; P = .01) group but not the regional-pain group (3.05 ± 0.66 Nm/kg; P = .24). Control individuals presented with more quadriceps activation (97.93% ± 3.12) than the PT (84.44% ± 16.98; P < .01) and regional-pain (91.17% ± 10.56; P = .01) groups. No differences were present for any measures between the PT and regional-pain groups (P values > .05).

conclusionsDeficits in spinal-reflex excitability, quadriceps activation, and strength were present in both the PT and regional-pain groups. A combination of pain and structural damage appeared to have the greatest negative effect on quadriceps function, as only the PT group presented with neuromuscular outcomes that failed to meet clinical thresholds.

Indexed as

Knee InjuriesMuscle WeaknessMusculoskeletal PainQuadriceps MuscleTendinopathyAdultCross-Sectional StudiesFemaleHumansMaleMechanoreceptorsNeurologic ExaminationOutcome Assessment, Health CarePatellar LigamentUltrasonographydiagnostic imagingknee painmuscle inhibitiontendinopathy

Identifiers

PMID32348153
PMCPMC7319745
OpenAlexW3020563093

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.