title: Downbeat nystagmus as the salient manifestation of the Arnold-Chiari malformation.
abstract: A case of Arnold-Chiari malformation Type I presented with the isolated finding of downbeat nystagmus. The mechanism of downbeat nystagmus is discussed along with its subjective manifestation referred to as oscillopsia. In addition, the value of metrizamide cisternography in diagnosing the Arnold-Chiari malformation is illustrated.
mesh_terms: D000328:Adult; D001139:Arnold-Chiari Malformation / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D008297:Male; D008793:Metrizamide; D009192:Myelography; D009759:Nystagmus, Pathologic / Q000209:etiology*
chemical_list: D008793:Metrizamide