Histology, vascularity and innervation of the glenoid labrum
Background: Although the glenoid labrum has an important role in shoulder stability, little is known about its composition, vascularity and innervation. The aims of this study were therefore to evaluate the histology, vascularity and innervation of the glenoid labrum. Materials and methods: Ten glen...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2018-04-01
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| Series: | Journal of Orthopaedic Surgery |
| Online Access: | https://doi.org/10.1177/2309499018770900 |
| _version_ | 1819204834893496320 |
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| author | Abduelmenem Alashkham Abdulrahman Alraddadi Paul Felts Roger Soames |
| author_facet | Abduelmenem Alashkham Abdulrahman Alraddadi Paul Felts Roger Soames |
| author_sort | Abduelmenem Alashkham |
| collection | DOAJ |
| description | Background: Although the glenoid labrum has an important role in shoulder stability, little is known about its composition, vascularity and innervation. The aims of this study were therefore to evaluate the histology, vascularity and innervation of the glenoid labrum. Materials and methods: Ten glenoid labrum specimens (three male, two female: mean age 81.2 years, range 76–90 years) were detached at the glenoid neck. Following decalcification, sections were cut through the whole thickness of each specimen perpendicular to the glenoid labrum at 12 radii corresponding to a clock face superimposed on the glenoid fossa. Then they were stained using haematoxylin and eosin, a silver nitrate protocol or subjected to immunohistochemistry using anti-protein gene protein 9.5 to demonstrate neuronal processes. Results: The labrum was fibrocartilaginous, being more fibrous in its free margin. There was a variable distribution of blood vessels, being more vascular in its periphery, with many originating from the fibrous capsule and piercing the glenoid labrum. Immunohistochemistry revealed positive staining of nerve fibres within the glenoid labrum. Conclusion: The glenoid labrum is fibrocartilaginous, being more fibrous in its periphery, and is vascularized, with the anterosuperior aspect having a rich blood supply. Free sensory nerve fibres were also present; no encapsulated mechanoreceptors were observed. The presence of sensory nerve fibres in the glenoid labrum could explain why tears induce pain. It is postulated that these sensory fibres could play a role in glenohumeral joint proprioception. |
| first_indexed | 2024-12-23T04:42:07Z |
| format | Article |
| id | doaj.art-6b96860cee744f6dbf05f3d48667a081 |
| institution | Directory Open Access Journal |
| issn | 2309-4990 |
| language | English |
| last_indexed | 2024-12-23T04:42:07Z |
| publishDate | 2018-04-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Journal of Orthopaedic Surgery |
| spelling | doaj.art-6b96860cee744f6dbf05f3d48667a0812022-12-21T17:59:45ZengSAGE PublishingJournal of Orthopaedic Surgery2309-49902018-04-012610.1177/2309499018770900Histology, vascularity and innervation of the glenoid labrumAbduelmenem Alashkham0Abdulrahman Alraddadi1Paul Felts2Roger Soames3 Human Anatomy Department, Faculty of Medicine, University of Zawia, Zawia, Libya King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia Centre for Anatomy and Human Identification, University of Dundee, Dundee, UK Centre for Anatomy and Human Identification, University of Dundee, Dundee, UKBackground: Although the glenoid labrum has an important role in shoulder stability, little is known about its composition, vascularity and innervation. The aims of this study were therefore to evaluate the histology, vascularity and innervation of the glenoid labrum. Materials and methods: Ten glenoid labrum specimens (three male, two female: mean age 81.2 years, range 76–90 years) were detached at the glenoid neck. Following decalcification, sections were cut through the whole thickness of each specimen perpendicular to the glenoid labrum at 12 radii corresponding to a clock face superimposed on the glenoid fossa. Then they were stained using haematoxylin and eosin, a silver nitrate protocol or subjected to immunohistochemistry using anti-protein gene protein 9.5 to demonstrate neuronal processes. Results: The labrum was fibrocartilaginous, being more fibrous in its free margin. There was a variable distribution of blood vessels, being more vascular in its periphery, with many originating from the fibrous capsule and piercing the glenoid labrum. Immunohistochemistry revealed positive staining of nerve fibres within the glenoid labrum. Conclusion: The glenoid labrum is fibrocartilaginous, being more fibrous in its periphery, and is vascularized, with the anterosuperior aspect having a rich blood supply. Free sensory nerve fibres were also present; no encapsulated mechanoreceptors were observed. The presence of sensory nerve fibres in the glenoid labrum could explain why tears induce pain. It is postulated that these sensory fibres could play a role in glenohumeral joint proprioception.https://doi.org/10.1177/2309499018770900 |
| spellingShingle | Abduelmenem Alashkham Abdulrahman Alraddadi Paul Felts Roger Soames Histology, vascularity and innervation of the glenoid labrum Journal of Orthopaedic Surgery |
| title | Histology, vascularity and innervation of the glenoid labrum |
| title_full | Histology, vascularity and innervation of the glenoid labrum |
| title_fullStr | Histology, vascularity and innervation of the glenoid labrum |
| title_full_unstemmed | Histology, vascularity and innervation of the glenoid labrum |
| title_short | Histology, vascularity and innervation of the glenoid labrum |
| title_sort | histology vascularity and innervation of the glenoid labrum |
| url | https://doi.org/10.1177/2309499018770900 |
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