The Type of Synovial Joint Between the Atlas and Axis

Here the upward projecting dens of the axis articulates with the inner aspect of the atlas where it is held in place by a ligament. Rotation at this joint.

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An example would be the atlantoaxial joint between C1 atlas and C2 axis of the vertebrae permitting side-to.

. Synovial joints are the most common type of joint in the body see image 1. The joint cavity contains synovial fluid secreted by the synovial membrane which lines the articular. Median atlantoaxial joint.

An example of a pivot joint is the atlantoaxial joint found between the C1 atlas and C2 axis vertebrae. These joints are termed diarthroses meaning they are freely mobile. This type of joint is uniaxial because although the bone rotates within this ring it does so around a single axis.

Since the rotation is around a single axis pivot joints are functionally classified as a uniaxial diarthrosis type of joint. A key structural characteristic for a synovial joint that is not seen at fibrous or cartilaginous joints is the presence of a joint cavity. A pivot joint is an articulation within a ligamentous ring between the rounded end of one bone and another bone.

Hyaline-covered synovial joint between the dens of the axis and the posterior aspect of the anterior arch of the atlas allowing for the rotation of the head. Hyaline-covered synovial joint between the inferior articular facet of the atlas. The dens is held in place by the transverse ligament with a bursa between the two.

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