10,18) The proposed etiology is avulsion of the insertion of the alar ligament
on the dens resulting in an oblique fracture of the dens tip as shown in Figure 6.
Krakenes explained that on MRI, normal alar ligaments and membranes show low signal intensity and appear dark.
Most of the damage among patients in the whiplash group with grade 2 or 3 lesions was localized to the alar ligaments.
1%) of injuries to the alar ligaments
that were accompanied by signs of instability.
Analysis of MRI and MRI video findings in craniocervical instability pathology of 420 patients with clinical symptoms consistent with possible spinal instability Findings Patients n (%) Complete alar ligament
rupture [*] 20 (4.