_:vb50952042 . _:vb50952042 . _:vb50952042 . _:vb50952042 "url:https://en.wikipedia.org/wiki/Brainstem"^^ . _:vb50952042 "A brain infarction that is characterized by stroke of the brain stem that develops from blockage or narrowing in the arteries located_in the brainstem, has_material_basis_in damage to the cranial nerve nuclei and long tracts, has_symptom vertigo, has_symptom imbalance, has_symptom decreased level of arousal."^^ . _:vb50952042 . _:vb50952042 . _:vb50952042 "url:https://en.wikipedia.org/wiki/Brainstem_stroke_syndrome"^^ .