alar ligament


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

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
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
We documented 72 cases (17.1%) of injuries to the alar ligaments that were accompanied by signs of instability.
A widened or uneven atlantodental distance implies that the alar ligaments are disrupted or dysfunctional.
After the alar ligaments were destroyed as well, diameter of the PADI increased to a mean of 18.00 mm [+ or -] 2.70 in neutral position and altered significantly (p = 0.04) in contrast to values assessed in specimen, if only the transverse ligament was cut.
Most of the damage among patients in the whiplash group with grade 2 or 3 lesions was localized to the alar ligaments. "That surprised us," Dr.
Most of the damage in the whiplash group patients with grade 2 or 3 lesions was localized to the alar ligaments, said Dr.
Rotation in the cervical spine is mainly based on the atlantoaxial joint, wherein the transverse and alar ligaments provide ligamentous stability.