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Vet Comp Orthop Traumatol 2007; 20(04): 291-295
DOI: 10.1160/VCOT-07-01-0005
Original Research
Schattauer GmbH

Mechanoreceptors in the medial and lateral glenohumeral ligaments of the canine shoulder joint

A. Grandis
1   Department of Veterinary Morphophysiology and Animal Productions, University of Bologna, Ozzano dell'Emilia, Bologna, Italy
,
A. Spadari
2   Veterinary Clinical Department, University of Bologna, Ozzano dell'Emilia, Bologna, Italy
,
C. Bombardi
1   Department of Veterinary Morphophysiology and Animal Productions, University of Bologna, Ozzano dell'Emilia, Bologna, Italy
,
A. Casadio Tozzi
2   Veterinary Clinical Department, University of Bologna, Ozzano dell'Emilia, Bologna, Italy
,
N. De Sordi
1   Department of Veterinary Morphophysiology and Animal Productions, University of Bologna, Ozzano dell'Emilia, Bologna, Italy
,
M. L. Lucchi
1   Department of Veterinary Morphophysiology and Animal Productions, University of Bologna, Ozzano dell'Emilia, Bologna, Italy
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Publikationsverlauf

Received 09. Januar 2007

Accepted 08. Februar 2007

Publikationsdatum:
18. Dezember 2017 (online)

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Summary

In order to have a better understanding of the role of ligaments in canine shoulder joint stability, the presence of mechanoreceptors in the medial (MGHL) and lateral (LGHL) glenohumeral ligaments was detected by means of a modified gold chloride stain. Three morphologically distinct mechanoreceptors were identified: Ruffini receptors (type I endings), Pacinian corpuscles (type II endings) and Golgi tendon organ-like receptors (type III endings). These receptors are mainly localized at each end of the ligaments and are prevalently in their glenoid portion. In particular, in the MGHL the highest density was at the cranial arm of the insertion into the scapula. The variety of mechanoreceptors in canine shoulder ligaments might indicate an afferent function in providing the CNS with joint proprioceptive information. Therefore, besides acting as passive mechanical stabilizers, the MGHL and the LGHL may serve as sensory structures, contributing actively to joint stability. Ligamentous injuries which occur in shoulders not only affect mechanical restraint but also alter the proprioceptive input to the CNS by means of disruption of the mechanoreceptors.

Keywords

Mechanoreceptors - glenohumeral ligaments - shoulder joint stability - dog
 

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