Evidence map›Paper›PMID 40094078›Full record

ArticleJB & JS open access

Anatomic Study of Hip Pericapsular Muscle Arrangement on the Joint Capsule.

Masahiro Tsutsumi, Akimoto Nimura, Hajime Utsunomiya, Masahiro Ikezu, Yasuhiko Iizuka, Shintarou Kudo, Keiichi Akita

Abstract read
In one paragraph

Article in JB & JS open access. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
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

3 citing papers in PubMed.

  1. 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

7 authors.

Masahiro TsutsumiInclusive Medical Sciences Research Institute, Morinomiya University of Medical Sciences, Osaka, Japan.ORCID https://orcid.org/0000-0003-1803-8202
Akimoto NimuraDepartment of Functional Joint Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.ORCID https://orcid.org/0000-0002-3054-0273
Hajime UtsunomiyaTokyo Sports & Orthopaedic Clinic, Tokyo, Japan.ORCID https://orcid.org/0000-0001-6940-6146
Masahiro IkezuInclusive Medical Sciences Research Institute, Morinomiya University of Medical Sciences, Osaka, Japan.ORCID https://orcid.org/0000-0002-7831-2472
Yasuhiko IizukaDepartment of Radiology, AR-Ex Oyamadai Orthopedic Clinic Tokyo Arthroscopy Center, Tokyo, Japan.ORCID https://orcid.org/0009-0009-1030-639X
Shintarou KudoInclusive Medical Sciences Research Institute, Morinomiya University of Medical Sciences, Osaka, Japan.ORCID https://orcid.org/0000-0001-9483-1830
Keiichi AkitaDepartment of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.ORCID https://orcid.org/0000-0002-2927-2937

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Despite the recognized importance of pericapsular muscles in hip stability, their specific roles in stability remain debated. For anatomically elucidating how the pericapsular muscles can act on the femoral head and neck through the joint capsule, this study aimed to investigate pericapsular muscle arrangement on the joint capsule with a positional relation to the femoral head and neck and their histological relationships. Methods: Eight hips of 7 anatomic donors (average age, 72.5 years) fixed with 8% formalin were analyzed. Five hips were macroscopically assessed to determine the arrangement of the pericapsular muscles (iliopsoas, gluteus minimus, gemelli muscles, obturator internus, and externus) on the joint capsule, and 3 were analyzed histologically. Results: When viewed from the side of the greater trochanter (posterolateral aspect), the pericapsular muscles were macroscopically arranged spirally and ran clockwise around the femoral neck axis on the joint capsule of the right hip. The gluteus minimus had histological continuity to the joint capsule through the tendon. The other pericapsular muscles, including the iliopsoas, obturator externus, and complex of the obturator internus, had histological continuity to the joint capsule through their perimysium. Conclusions: The pericapsular muscles were arranged on the joint capsule in a spiral pattern, with histologically close continuity to the joint capsule through the perimysium or tendon. Clinical Relevance: The contraction force of the pericapsular muscles may be generated spirally with their centripetal force because they maintain their spiral running course through histological continuity. The pericapsular muscles may be vital in maintaining the centric position of the femoral head by balancing their centripetal forces through the joint capsule.

Identifiers

PMID40094078
PMCPMC11896106

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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.