Alar ligaments

Original Editor - Rachael Lowe

Top Contributors - Rachael Lowe, Evan Thomas, Alistair James and George Prudden  

Description

Tectorial membrane.png

Two strong rounded cords that attach the skull to C2 (Axis).

Attachments

Arise from either side of the odontoid process and attach to the medial aspect of the occipital condyles.

Function

Taut in flexion, limit rotation and side flexion to the opposite side.

Play a role in stabilizing C1 and C2, especially in rotation[1].

Pathology

Injured in rear end motor vehicle collisions when the cervical spine is in extremes of rotation.

Examination

Alar ligament test

References

  1. Magee DJ (2007). Orthopedic Physical Assessment (5th ed). St Louis, MO: Saunders Elsevier.