alar ligament

Membrana

tectoria, transverse, and alar ligaments.

Alar ligament

• Alar and cruciform ligament anatomy - Ganzer Fall bei Radiopaedia

Skalski M, Alar and cruciform ligament anatomy. Case study, Radiopaedia.org (Accessed on 11 Feb 2023) https://doi.org/10.53347/rID-45136 • CC by-nc-sa 3.0 (modified)

Tectorial

membrane of the spine • Tectorial membrane and C0-1-2 ligaments (Gray's illustration) - Ganzer Fall bei Radiopaedia

Hacking, C. Tectorial membrane and C0-1-2 ligaments (Gray's illustration). Case study, Radiopaedia.org. (accessed on 21 Oct 2022) https://doi.org/10.53347/rID-83606 • CC by-nc-sa 3.0 (modified)

Radiopaedia • CC-by-nc-sa 3.0 • de

The alar ligaments join the lateral margins of the sloping upper posterior margin of the dens of C2 to the lateral margins of the foramen magnum (adjacent to the occipital condyles) and lie on either side of the apical ligament. They may be oblique or vertical and are thickest at the occipital attachment. They are paired ligaments that are very strong and limit axial rotation and contralateral lateral flexion of the head.

In conjunction with the transverse band of the cruciform ligament, they are the primary stabilizers of the atlantoaxial joint .