ligament

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Magnetic resonance imaging can be employed to evaluate the transverse ligament, alar ligaments, and spinal cord [4, 24].
Anderson and Montesano12 Classification of Occipital Condyle Fractures Type Description Biomechanics Type I Impaction Results from axial loading; ipsilateral alar ligament may be compromised, but stability is maintained by contralateral alar ligament and tectorial membrane Type II Skull base extension Extends from occipital bone via condyle to enter foramen magnum; stability is maintained by intact alar ligaments and tectorial membrane Type III Avulsion Mediated via alar ligament tension; associated disruption of tectorial membrane and contralateral alar ligament may cause instability Table 2.
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.
He explained that on MRI normal alar ligaments and membranes show low signal intensity and appear dark.