title: [Vestibular testing abnormalities in individuals with motion sickness].
abstract: OBJECTIVE
  To evaluate the vestibular function of motion sickness.
  
  
  METHODS
  VNG, which tests the vestibular function of horizontal semicircular canal, and CPT, which tests vestibulospinal reflex and judge proprioceptive, visual and vestibular status, were performed in 30 motion sickness patients and 20 healthy volunteers (control group). Graybiel score was recorded at the same time.
  
  
  RESULTS
  Two groups' Graybiel score (12.67 +/- 11.78 vs 2.10 +/- 6.23; rank test P<0.05), caloric test labyrinth value [(19.02 +/- 8.59) degrees/s vs (13.58 +/- 5.25) degrees/s; t test P<0.05], caloric test labyrinth value of three patients in motion sickness group exceeded 75 degrees/s. In computerized posturography testing (CPT), motion sickness patients were central type (66.7%) and disperse type (23.3%); all of control group were central type. There was statistical significance in two groups' CTP area, and motion sickness group was obviously higher than control group. While stimulating vestibulum in CPT, there was abnormality (35%-50%) in motion sickness group and none in control group. Generally evaluating CPT, there was only 2 proprioceptive hypofunction, 3 visual hypofunction, and no vestibular hypofunction, but none hypofunction in control group.
  
  
  CONCLUSIONS
  Motion sickness patients have high vestibular susceptible, some with vestibular hyperfunction. In posturography, a large number of motion sickness patients are central type but no vestibular hypofunction, but it is hard to keep balance when stimulating vestibulum.
authors.affiliation: Department of Otolaryngology, the Second Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510060, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Ma
authors.forename: Yongkang
authors.initials: Y
authors.lastname: Ou
authors.forename: Ling
authors.initials: L
authors.lastname: Chen
authors.forename: Yiqing
authors.initials: Y
authors.lastname: Zheng
mesh_terms: D000328:Adult; D002150:Caloric Tests; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D009041:Motion Sickness / Q000175:diagnosis / Q000503:physiopathology*; D015837:Vestibular Diseases / Q000175:diagnosis / Q000503:physiopathology*; D055815:Young Adult