Superficial anterior atlanto-occipital ligament: Anatomy of a forgotten structure with relevance to craniocervical stability
| Autor: | Joe Iwanaga, Koichi Watanabe, R. Shane Tubbs, Shogo Kikuta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
lcsh:Diseases of the musculoskeletal system
cervical vertebra 03 medical and health sciences 0302 clinical medicine Atlas (anatomy) Cadaver craniocervical joint Medicine Anterior tubercle 030222 orthopedics business.industry Occipital bone Occiput Craniocervical junction Anatomy Limiting cadaver ligaments medicine.anatomical_structure Ligament Surgery Original Article Neurology (clinical) lcsh:RC925-935 business 030217 neurology & neurosurgery |
| Zdroj: | Journal of Craniovertebral Junction & Spine Journal of Craniovertebral Junction and Spine, Vol 10, Iss 1, Pp 42-45 (2019) |
| ISSN: | 0976-9285 0974-8237 |
| Popis: | Introduction: The superficial anterior atlanto-occipital ligament (SAAOL) is a narrowband located anterior to the anterior atlanto-occipital membrane. Nearly forgotten, it has not been well described in older anatomical textbooks and is missing in the current anatomical literature. As all of the binding structures of the craniocervical junction (CCJ) are important in maintaining stability, this study aims to clarify the anatomy and potential function of the SAAOL. Materials and Methods: The CCJ from ten fresh-frozen cadavers was studied. These specimens were derived from three males and seven females, and the age at death ranged from 57 to 91 years (mean, 79.8 years). The length, width, and thickness of the SAAOL were measured. In five specimens, the force to failure was recorded. Results: The SAAOL was found between the anterior tubercle of the atlas and the occiput and located as central thick fibers in front of the anterior atlanto-occipital membrane in 9 (90%) specimens. In one specimen, the vertical band to the occipital bone did not attach to the anterior tubercle of the atlas, but extended to the anterior aspect of the axis. The mean length, width, and thickness of the SAAOL were 19.8, 6.2, and 0.6 mm, respectively. The force to failure for the ligament was 38.8 N. Conclusion: The SAAOL was a constant structure of the anterior atlanto-occipital joint. This ligament seems to be a secondary stabilizer of the CCJ by limiting the extension of CCJ. Knowledge of this ligament may help in further understanding of craniocervical stability. |
| Databáze: | OpenAIRE |
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