How is atlanto axial instability diagnosed?
CT and MRI Use of computed tomography (CT) can provide additional information regarding the stability of the atlantoaxial joint. Measuring displacement of defining rotation may be difficult on plain radiographs. Fine-cut CT with reformatting can be used for measuring the amount of displacement.
What does atlantoaxial instability cause?
Atlanto-axial instability (AAI) is a condition that affects the bones in the upper spine or neck under the base of the skull. The joint between the upper spine and base of the skull is called the atlanto-axial joint. In people with Down syndrome, the ligaments (connections between muscles) are “lax” or floppy.
What is movement occur at atlanto axial joint?
The primary movement of the atlantoaxial joint complex is rotation. In rotation the atlas together with the head, rotate around the dens of axis. This movement allows us to turn our head to look towards the left or towards the right.
What do the axial ligaments do?
Axial ligaments connect vertebrae to each other, thereby contributing to the stability of the spine. In humans, there are anterior and posterior longitudinal ligaments that cover the complete length of the spinal column.
When you shake your head from side to side at the atlantoaxial joint What type of joint is functioning?
The atlantoaxial pivot joint provides side-to-side rotation of the head, while the proximal radioulnar articulation allows for rotation of the radius during pronation and supination of the forearm. Hinge joints, such as at the knee and elbow, allow only for flexion and extension.
What kind of joint is atlanto axial?
The atlanto-axial joint is a joint between the atlas bone and the axis bone, which are the first and second cervical vertebrae. It is a pivot joint. There is a pivot articulation between the odontoid process of the axis and the ring formed by the anterior arch and the transverse ligament of the atlas.
Which ligament is called as check ligament in atlanto axial joints?
Which ligament controls side flexion in atlanto-axial joints?
Since the most mobile portion of the cervical spine is the atlantoaxial joint, the main stabilization sources are the two major surrounding and stabilizing ligaments: the transverse ligament and the alar ligament.
What joint is between the atlas and axis?
atlanto-axial joint
The atlas and axis form the atlanto-axial joint, which allows head rotation. If you shake your head as if to say “no,” that is head rotation. The atlanto-axial joint is a compound synovial joint.