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Morphological study of mechanoreceptors in collateral ligaments of the ankle joint.

Wu X, Song W, Zheng C, Zhou S, Bai S - J Orthop Surg Res (2015)

Bottom Line: 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.This indicates that the main function of ankle collateral ligaments is to sense joint speeds in motions.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedics, Sanxiang Hospital, Zhongshan, Guangdong Province, 528463, China. xiaochuanwu37@yeah.net.

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.

No MeSH data available.


Segmental distributions of sensory receptors in the ankle collateral ligament (mean ± SD)
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Fig8: Segmental distributions of sensory receptors in the ankle collateral ligament (mean ± SD)

Mentions: As is shown in Tables 1 and 2, type II (Pacini corpuscle) was predominant in the number of all four types of sensory receptors. The number of Pacini corpuscle was significantly higher than other receptors (one-way ANOVA, p < 0.01) (Figs. 7 and 8 and Tables 2 and 3).Table 2


Morphological study of mechanoreceptors in collateral ligaments of the ankle joint.

Wu X, Song W, Zheng C, Zhou S, Bai S - J Orthop Surg Res (2015)

Segmental distributions of sensory receptors in the ankle collateral ligament (mean ± SD)
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4469580&req=5

Fig8: Segmental distributions of sensory receptors in the ankle collateral ligament (mean ± SD)
Mentions: As is shown in Tables 1 and 2, type II (Pacini corpuscle) was predominant in the number of all four types of sensory receptors. The number of Pacini corpuscle was significantly higher than other receptors (one-way ANOVA, p < 0.01) (Figs. 7 and 8 and Tables 2 and 3).Table 2

Bottom Line: 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.This indicates that the main function of ankle collateral ligaments is to sense joint speeds in motions.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedics, Sanxiang Hospital, Zhongshan, Guangdong Province, 528463, China. xiaochuanwu37@yeah.net.

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.

No MeSH data available.