Cognetti’s et al article about Eagle’s caused by styloid processes close to the C1:
[Styloid/C1 transverse process juxtaposition as a cause of Eagle's syndrome - PubMed]
or
[ https://onlinelibrary.wiley.com/doi/full/10.1002/hed.24024 ]
(or full access [ C1 transverse process juxtaposition as a cause of Eagle's syndrome. - PDF Download Free ] )