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Cervical Vertebrae Anatomy
Transcript of Cervical Vertebrae Anatomy
separates the odontoid process from the body of C2. The synchondrosis is seen in virtually all children aged 3 years and is absent in those aged 6 years. The apical portion of the dens ossifies by age 3-5 years and fuses with the rest of the structure around age 12 years. This synchondrosis should not be confused with a fracture. neurocentral synchondrosis Articulation The atlanto-occipital joint (articulation between the atlas and the occipital bone) consists of a pair of condyloid joints. The atlanto-occipital joint is a synovial joint. This joint is responsible for the flexion and extension of the head, i.e. nodding movement. Atlanto-occipital joint The movement of shaking or rotating the head left and right happens almost entirely at the joint between the atlas and the axis, the atlanto-axial joint Atlanto-axial joint Transverse Foramen The transverse foramen (Latin: foramen transversarium) pierces the transverse processes of the seven cervical vertebrae. In the upper six vertebrae, the foramen gives passage to the vertebral artery, vertebral vein, and a plexus of sympathetic nerves. The seventh foramen lacks the artery, but contains the vein and sympathetic nerves. The Three-Column Concept 1. Anterior column - made up of the anterior longitudinal ligament and the anterior one-half of the vertebral body, disc, and annulus. 2. Middle column - made up of the posterior one-half of the vertebral body, disc, and annulus, and the posterior longitudinal ligament. 3. Posterior column - made up of the facet joints, ligamentum flavum, the posterior elements and the interconnecting ligaments. Thank you!