title: The clinical differentiation of cerebellar infarction from common vertigo syndromes.
abstract: This article summarizes the emergency department approach to diagnosing cerebellar infarction in the patient presenting with vertigo. Vertigo is defined and identification of a vertigo syndrome is discussed. The differentiation of common vertigo syndromes such as benign paroxysmal positional vertigo, Meniere's disease, migrainous vertigo, and vestibular neuritis is summarized. Confirmation of a peripheral vertigo syndrome substantially lowers the likelihood of cerebellar infarction, as do indicators of a peripheral disorder such as an abnormal head impulse test. Approximately 10% of patients with cerebellar infarction present with vertigo and no localizing neurologic deficits. The majority of these may have other signs of central vertigo, specifically direction-changing nystagmus and severe ataxia.
authors.affiliation: University of California at San Diego, Department of Emergency Medicine.
authors.forename: James A
authors.initials: JA
authors.lastname: Nelson
authors.forename: Erik
authors.initials: E
authors.lastname: Viirre