<unk>  significantly affects the aging world population and is associated with significant morbidity. It affects men and women equally when occurring due to atlanto-occipital assimilation. Increased incidences among low-socioeconomic groups and among groups that do not have access to healthcare show subsequently higher rates of morbidity and mortality.
Cervicocranial syndrome
Brainstem stroke syndrome
Chiasmal syndrome
Occipital horn syndrome
Lateral medullary syndrome
Cerebellar stroke syndrome
Medial medullary syndrome
Cerebellopontine angle syndrome