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Journal of Orthopaedic Surgery and Research
Published in: Journal of Orthopaedic Surgery and Research 1/2015

Open Access 01-12-2015 | Research article

Morphological study of mechanoreceptors in collateral ligaments of the ankle joint

Published in: Journal of Orthopaedic Surgery and Research | Issue 1/2015

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Abstract

Background

The aim of this study was to analyze the pattern and types of sensory nerve endings in ankle collateral ligaments using histological techniques, in order to observe the morphology and distribution of mechanoreceptors in the collateral ligaments of cadaver ankle joint, and to provide the morphological evidence for the role of the ligament in joint sensory function.

Methods

Twelve lateral collateral ligaments including anterior talofibular ligament (ATFL; n = 6), posterior talofibular ligament (PTFL; n = 6), and calcaneofibular ligament (CFL; n = 6) were harvested from six fresh frozen cadavers. The ligaments were embedded in paraffin, sectioned at 4 μm, and then stained using a modified gold-chloride staining methods. The collateral ligament was divided into three segments: proximal, middle, and distal segments. Fifty-four ATFL slides, 90 PTFL slides, and 108 CFL slides were analyzed. Mechanoreceptors were classified based on Freemen and Wyke’s classification. Mechanoreceptor distribution was analyzed statistically. One-way ANOVA (postHoc LSD) was used for statistical analysis.

Results

All the four typical types of nerve endings (the Ruffini corpuscles, Pacinian corpuscles, Golgi tendon organs, and free nerve endings) were identified in these ligaments. Pacinian corpuscles were the predominant in all four complexes. More mechanoreceptors were found in synovial membrane near both ends of the ligaments attached to the bone. No statistical differences were found in the amount of mechanoreceptors among distal, middle, and proximal parts of the ligaments.

Conclusions

The four typical types of mechanoreceptors were all identified in the collateral ligaments of the human ankle. Pacinian corpuscles were the predominant in all four complexes. This indicates that the main function of ankle collateral ligaments is to sense joint speeds in motions.
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Metadata
Title
Morphological study of mechanoreceptors in collateral ligaments of the ankle joint
Publication date
01-12-2015
Published in
Journal of Orthopaedic Surgery and Research / Issue 1/2015
Electronic ISSN: 1749-799X
DOI
https://doi.org/10.1186/s13018-015-0215-7

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