RESUMO
The advent of magnetic resonance imaging and angiography has clarified the location and vascular basis for vertigo of a syndromal type. The composite presentation of a vestibular symptom with evidence of cranial nerve or cerebellar dysfunction suggests a lesion within the pons, medulla, or cerebellum. The location may be exactly defined by noninvasive techniques and appropriate therapy can be initiated. Clinical examples are presented; the syndromes of vertebrobasilar artery perfusion disorder are described, and appropriate images are illustrated for confirmation.
Assuntos
Encéfalo/irrigação sanguínea , Angiografia por Ressonância Magnética , Vertigem/diagnóstico , Adulto , Idoso , Idoso de 80 Anos ou mais , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Insuficiência Vertebrobasilar/complicações , Insuficiência Vertebrobasilar/diagnóstico , Vertigem/etiologiaRESUMO
This report describes the normal arterial patterns of the vestibulocerebellar regions visualized by magnetic resonance angiography. Variations in the vertebrobasilar arterial system are described, limitations in imaging are discussed, and collateral connections within the cerebellar vessels and the circle of Willis are reviewed. Clinical correlations are defined between the vestibular nuclei, the associated intraaxial tracts, and with specific posterior cerebral and brain stem arteries.
