The posterior inferior cerebellar artery is an artery that provides blood flow to the cerebellum. Out of all the cerebral arteries, it is considered the most variable. It is mostly made up of the supratonsillar segment and parts of the medulla. The posterior inferior cerebellar artery generally feeds the inferior portion of the vermis, the lower medulla, and the posteroinferior cerebellar hemispheres, including the neucleus gracilis, biventral lobule, cerebellar tonsils, and the superior semilunar lobule. Occlusion of the posterior inferior cerebellar artery may cause an infarction of the medulla oblongata's dorsolateral aspect. This may lead to lateral medullary syndrome, which may result in tissue necrosis. One major symptom is diminished sensations of pain and temperature below the chin and on the ipsalateral portion of the face. Other symptoms include vertigo, hiccups, nausea, dysphagia, and ipsalateral ataxia. Lateral medullary syndrome caused by damage to the posterior inferior cerebellar artery may be treated only by minimizing symptoms. Psychological therapy may be used to decrease the impact from neurologic impairment. A feeding apparatus may be used to compensate for swallowing malfunction. Blood thinners such as warfarin may also be used.