atlantoaxial joint

at·lan·to·ax·i·al joint

complex joint between first and second cervical vertebrae, consisting of the median and lateral atlantoaxial joints.

at·lan·to·ax·i·al joint

(at-lantō-aksē-ăl joynt) [TA]
Complex joint between first and second cervical vertebrae, consisting of the median and lateral atlantoaxial joints.


pertaining to the atlas and axis.

atlantoaxial joint
the articulation between the first two cervical vertebrae.
atlantoaxial membrane
the fibrous sheet which closes the interarcual space between the atlas and the axis.
atlantoaxial subluxation
degeneration or malformation of the dens is seen mainly in toy breeds of dogs predisposing to displacement of the axis. Fracture of the dens can occur in any animal. Compression of the cervical cord is a common sequel that causes neck pain and varying degrees of spastic tetraparesis. Treatment is surgical stabilization. Also reported in Holstein cattle.
References in periodicals archive ?
6] The symptoms of nuchal pain, and lancinating sensation with loss of power of upper and lower limb muscles indicate atlantoaxial joint disease with bursitis and subluxation of joint due to RA.
Rotation in the cervical spine is mainly based on the atlantoaxial joint, wherein the transverse and alar ligaments provide ligamentous stability.
It is generally accepted that there is a coupling pattern at the atlantoaxial joint.
As in rheumatoid arthritis, atlantoaxial joint subluxation, atlantooccipital subluxation and upward subluxation of the axis may occur in AS as a consequence of instability resulting from the inflammatory process.
Atlantoaxial subluxation involves a widened atlantoaxial joint that can be stable or unstable with movement.
The TAL is the most important ligament, stabilizing the atlantoaxial joint against translational forces.
Rare in adults, several conditions associated with abnormalities in the atlantoaxial joint or ligament laxity course with a higher incidence of this entity, such as rheumatoid arthritis, Sfndrome de Down, Sfndrome de Marfan, Sfndrome de Morquio e Sfndrome de Grisel (1, 2).
Severe muscle spasm of the neck secondary to osteomyelitis of the atlantoaxial joint.
Fractures of the first and second cervical vertebrae are particularly significant because nearly 40% of the motion of the spine occurs at the atlantoaxial joint, where the first and second vertebrae articulate.
Aim of the present study was to evaluate the metrical details of first and second cervical vertebrae to correct the instability of atlantoaxial joint, and to analyze the morphological features to understand the ergonomics of the craniovertebral joints.
The primary stabilizer of the atlantoaxial joint is transverse, and the secondary stabilizers are the alar ligaments.