title: Impaired visual suppression of manually rotated vestibuloocular reflex indicates the need of further evaluation by MRI and MRA in patients with vertigo.
abstract: OBJECTIVE
  MRI and MRA are accepted as valuable methods for diagnosing vertigo, although they are costly and time-consuming. Thus, some indicator of the necessity of a detailed evaluation by MRI and MRA is desirable.
  
  
  METHODS
  To assess the usefulness of an impairment of the visual suppression (VS) as an indicator, the relation between abnormal findings on MRI and/or MRA and impairment of the VS of manually rotated vestibuloocular reflex (VOR) was retrospectively examined in 40 consecutive patients suffering from vertigo.
  
  
  RESULTS
  12 of 23 patients with a low VS% were found to have a pathologic condition on MRI and/or MRA, however, no abnormality was found in any of the patients with a normal VS%. The rates of abnormality on MRI and/or MRA significantly differed between the 2 groups (chi2, P = 0.0004).
  
  
  CONCLUSIONS
  The VS% is thought to be a good indicator of the need for further evaluation by MRI and MRA in vertiginous patients.
authors.affiliation: Department of Otolaryngology, Kobe City General Hospital, Hyogo, Japan. yshiomi@yb3.so-net.ne.jp
authors.forename: Yosaku
authors.initials: Y
authors.lastname: Shiomi
authors.forename: Yoshiko
authors.initials: Y
authors.lastname: Shiomi
authors.forename: Naoharu
authors.initials: N
authors.lastname: Oda
authors.forename: Mitsuko
authors.initials: M
authors.lastname: Fujihara
mesh_terms: D000328:Adult; D000368:Aged; D006801:Humans; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D012189:Retrospective Studies; D014717:Vertigo / Q000175:diagnosis*