title: Subjective visual tilt and lateral instability after vestibular deafferentation.
abstract: CONCLUSIONS
  Defective utricular function, reflected by deviation of the perceived visual horizontal or vertical, cannot by itself explain increased postural sway in the lateral direction for patients with unilateral vestibular deafferentation (uVD).
  
  
  OBJECTIVE
  It is not known why some patients with chronic uVD report distressing unsteadiness while others do not. The objective of this study was to test the hypothesis that impaired utricular compensation, reflected by pathologic tilt in the subjective visual horizontal and vertical (SVH-V) test, would affect postural control in the lateral direction after uVD.
  
  
  METHODS
  The SVH-V was tested in 28 patients 6 months after translabyrinthine surgery for unilateral vestibular schwannoma, and correlated with posturography results.
  
  
  RESULTS
  No increase in lateral and anterior-posterior sway, or the quotients between them, or for Romberg quotients, was found with increasing SVH-V tilt.
authors.affiliation: Department of Otorhinolaryngology, Head and Neck Surgery, Clinical Sciences, Lund University Hospital, Lund, Sweden. anna.hafstrom@skane.se
authors.forename: Anna
authors.initials: A
authors.lastname: Hafstrom
authors.forename: Per-Anders
authors.initials: PA
authors.lastname: Fransson
authors.forename: Mikael
authors.initials: M
authors.lastname: Karlberg
authors.forename: Mans
authors.initials: M
authors.lastname: Magnusson
mesh_terms: D000328:Adult; D000344:Afferent Pathways / Q000503:physiopathology* / Q000601:surgery; D000368:Aged; D004292:Dominance, Cerebral / Q000502:physiology*; D005260:Female; D006801:Humans; D007699:Kinesthesis / Q000502:physiology*; D008297:Male; D008575:Meniere Disease / Q000503:physiopathology; D008875:Middle Aged; D009464:Neuroma, Acoustic / Q000503:physiopathology / Q000601:surgery*; D009949:Orientation / Q000502:physiology; D010037:Otolithic Membrane / Q000503:physiopathology; D011183:Postoperative Complications / Q000503:physiopathology*; D004856:Postural Balance / Q000502:physiology*; D012189:Retrospective Studies; D012444:Saccule and Utricle / Q000503:physiopathology*; D014724:Vestibular Function Tests; D014725:Vestibular Nerve / Q000503:physiopathology* / Q000601:surgery; D014796:Visual Perception / Q000502:physiology