Evidence map›Paper›PMID 34611591›Full record

ArticleJOR spine2021

Paraspinal muscle morphology and composition in adolescent idiopathic scoliosis: A histological analysis.

Bahar Shahidi, Andrew Yoo, Christine Farnsworth, Peter O Newton, Samuel R Ward

Open access · goldAbstract read
In one paragraph

Article in JOR spine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 1 pooled it
4.0field-weighted citation impact, top 5% 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

29 citing papers in PubMed, 1 synthesis or guideline pooled it, 34 citations in OpenAlex.

  1. Pooled it
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  8. Oxygen dynamics in paraspinal muscles during isometric loading measured using near-infrared spectroscopy in adolescents with idiopathic scoliosis: SOSORT 2025 award winner.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 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

5 authors at 2 institutions in 1 country.

Bahar ShahidiDepartment of Orthopaedic Surgery University of California San Diego La Jolla California USA.ORCID https://orcid.org/0000-0002-7532-6940
Andrew YooDepartment of Orthopaedic Surgery University of California San Diego La Jolla California USA.
Christine FarnsworthRady Children's Hospital San Diego California USA.ORCID https://orcid.org/0000-0001-7615-3749
Peter O NewtonDepartment of Orthopaedic Surgery University of California San Diego La Jolla California USA.
Samuel R WardDepartment of Orthopaedic Surgery University of California San Diego La Jolla California USA.
University of California San Diego · USRady Children's Hospital-San Diego · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAdolescent idiopathic scoliosis (AIS) is a condition resulting in spinal deformity and tissue adaptation of the paraspinal muscles. Although prior studies have demonstrated asymmetries in fiber type and other energetic features of muscle on the concave side of the curve, muscle morphology, architecture, and composition have not been evaluated. Therefore, the purpose of this study was to compare differences in paraspinal muscle microarchitecture and composition between concave and convex sides of a scoliotic curve in individuals with AIS.

methodsParaspinal muscle biopsies were obtained at the apex of the scoliotic curve in 29 individuals with AIS undergoing surgical deformity correction. Histological assays were performed to quantify fiber size, evidence of muscle degeneration and regeneration, and tissue composition (proportion of muscle, collagen, and fat). Differences between contralateral muscle samples were compared using two-tailed paired Student's

resultsMuscle fibers were significantly larger on the convex side of the curve apex (

conclusionsThis study demonstrates that although muscle fibers are larger on the convex side of the scoliotic curve in AIS, muscles on both sides are atrophic compared to non-scoliotic individuals, and demonstrate levels of collagen similar to severe degenerative spinal pathologies. These findings provide insight into biological maladaptations occurring in paraspinal muscle in the presence of AIS.

Indexed as

adolescent idiopathic scoliosisdeformitymusclespine

Identifiers

PMID34611591
PMCPMC8479518
OpenAlexW3199319966

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.