![]() ![]() Posterior atlantoaxial membrane (upper part of the ligamentun flavum between C1 and C2)Īnterior longitudinal ligament: passes anterior to the anterior atlantoaxial membrane before attaching to the anterior tubercle of C1 Transverse part - laterally attached to the medial aspect of the lateral masses of C1, provides the most stability retaining the dens in contact with the atlas (C1)įound between the tectorial membrane and apical ligamentĪccessory atlantoaxial ligament: from posterior body of C2 to lateral mass of C1Īnterior atlantoaxial membrane: from the body of the C2 to the anterior arch of C1 Longitudinal part - attached from the body of the axis to the basiocciput Sloping upper margin of dens to margin of foramen magnumĬruciform ligament with synovial bursa and fibrous capsule Intervertebral joint with C3 via the C2/C3 intervertebral discĪttached to the anterior surface of the vertebral bodyĮxtends upward in continuity with posterior longitudinal ligamentĪttached to back of body of C2 and anterior margin of foramen magnumĪpical ligament, embryological remnant of the notochordĪpex of dens to anterior margin of foramen magnum Inferior articular facets of C2 with superior articular facets of C3 (facet joints) Movement: head rotation, flexion/extensionĪrticulation: inferior articular facet of C1 with superior articular facet of C2, surfaces covered in hyaline cartilage Synovial with joint capsule and bursa between posterior dens and cruciform ligamentĪrticulation: anterior surface of dens with the posterior surface of anterior arch of C1, surfaces covered in hyaline cartilage Posterior elements of the axis are composed of: Inferior articular facets, face anteroinferiorly like typical cervical vertebra Superior articular facets, slopes down from body like shoulders, extends over pedicles and lateral masses ![]() Transverse process with foramina transversarium, L-shaped, directed up and out to allow lateral bend in vertebral artery Lateral mass bears the weight of skull and transfers through to C3 vertebral body In skeletally mature individuals, there is almost always a lucent or sclerotic remnant of the synchondrosis between the body and dens Odontoid process (dens or peg): conical in shape, projects up from the body, smooth posterior surface The axis is formed by a body with the attached dens, two lateral masses, a posterior neural arch (formed by the pedicle and a thick lamina), and a large spinous process, which is commonly bifid.Īnterior components of the axis are composed of: ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |