The median atlanto-axial joint ( Latin: Articulatio atlanto-axialis mediana ) is a joint that forms between the posterior surface of the anterior arch of the first and the tooth of the second cervical vertebra .
| Mid Atlantoaxial Joint | |
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| lat Articulatio atlanto-axialis mediana | |
 The posterior surface of the ligamentous apparatus of the median atlantis axial joint | |
 Lateral surface of the ligamentous apparatus of the median atlantis axial joint | |
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Content
Anatomy
The ligamentous apparatus of the joint includes:
1. The stretched between the front edge of the large occipital foramen and the body of the II cervical vertebra . It covers the back of the tooth and the transverse ligament of Atlanta . It is considered as part of the posterior longitudinal ligament of the spine [2] .
2. The , which consists of longitudinal and transverse bundles. The transverse part is called the transverse ligament of Atlanta. It is located between the inner surfaces of the lateral masses of the atlas and is adjacent to the posterior surface of the tooth of the axial vertebra, strengthening it. Longitudinal upper and lower bundles begin from the middle part of the transverse ligament and are attached to the front surface of the large occipital foramen and the posterior surface of the epistrophy body , respectively [2] . This ligament is of great functional importance, since on the one hand it directs the movement of the tooth, and on the other, it keeps it from dislocation, which can lead to injury to the brain substance [3] .
3. The , which extends between the top of the tooth II of the cervical vertebra and the middle part of the front edge of the large occipital foramen [2] .
4. The formed by bundles of fibers that are stretched between the lateral surfaces of the tooth and the inner surfaces of the occipital condyles [2] , forming an angle of about 140 ° with them [4] . These ligaments hold the top of the tooth during rotation [5] . Normally, they prevent head movements to the side by more than 21 ° [6] .
See also
- Lateral atlantoaxial joint .
Notes
- ↑ 1 2 Foundational Model of Anatomy
- ↑ 1 2 3 4 Sinelnikov, 1996 , p. 145.
- ↑ Weight gain, 1998 , p. 72.
- ↑ Osmotherly PG, Rivett DA, Mercer SR Revisiting the clinical anatomy of the alar ligaments // European Spine Journal. - 2013 .-- Vol. 22, No. 1 . - P. 60-64. - DOI : 10.1007 / s00586-012-2496-4 . - PMID 22968541 .
- ↑ Weight gain, 1998 , p. 73.
- ↑ Osmotherly PG, Rivett D., Rowe LJ Toward Understanding Normal Craniocervical Rotation Occurring During the Rotation Stress Test for the Alar Ligaments // Physical Therapy. - 2013 .-- Vol. 93, no. 7 . - P. 986-992. - ISSN 1538-6724 . - DOI : 10.2522 / ptj.20120266 . - PMID 23538587 . Archived on October 7, 2015.
Literature
- Weight M.G., Lysenkov N.K., Bushkovich V.I. Human anatomy. - 11th ed .. - St. Petersburg. : Hippocrates, 1998 .-- 704 p. - ISBN 5-8232-0192-3 .
- Sinelnikov R. D., Sinelnikov Y. R. Atlas of human anatomy. - 2nd ed .. - M .: Medicine, 1996. - T. 1. - 344 p. - ISBN 5-225-02721-0 .