alar ligament


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alar ligament

one of a pair of ligaments that connect the axis to the occipital bone and limit rotation of the cranium. Also called check ligament, odontoid ligament. Compare membrana tectoria.

alar ligament

One of a pair of short round ligaments extending up from the sides of the dens, through the foramen of the atlas, and attaching to the sides of the foramen magnum of the skull. They limit side flexion and rotation of the head in relation to the vertebral column
See also: ligament
References in periodicals archive ?
When one alar ligament is injured, the main mechanism of motion restriction--axial rotation--is no longer limited.
Based on the observation of incomplete rupture of other ligaments--such as those in the shoulder, knee, and ankle joint [22]--we can anticipate that if scarring forms in the disrupted, over-stretched alar ligament, it would manifest as an inhomogeneous, asymmetrical band mass.
In our study, 42 patients with unstable alar ligament injuries and contralateral joint rupture were stabilized by dorsal fusion of C0-C1-C2.
Most of the damage among patients in the whiplash group with grade 2 or 3 lesions was localized to the alar ligaments.
Most of the damage in the whiplash group patients with grade 2 or 3 lesions was localized to the alar ligaments, said Dr.
The alar ligaments are also deep to the tectorial membrane.