title: [The significance of the alerting tasks in the vestibular's caloric test].
abstract: OBJECTIVE
  To evaluate the vestibular's sensitivity to the stimulus of the cold and hot water.
  
  
  METHODS
  Forty volunteers are randomly divided into four groups, group one for maths calculation, group two for answering the questions (they are active alerting groups) and group three and four for listening to music and to stories respectively (they are passive alerting groups). Each group has ten volunteers, their left ears are separately stimulated with the cold and hot water, recording the nystagmus slow phase velocity for 20 s at the highest level with the nystagmography instrument of HB-3 ENG computer treatment system.
  
  
  RESULTS
  There are significant differences between the two active alerting groups and the two passive ones (P < 0.01).
  
  
  CONCLUSIONS
  In performing the vestibular's caloric test, it's more reasonable for clinic to use active alerting tasks.
authors.affiliation: Department of Otolaryngology, Third Affiliated Hospital of Henan Medical University, Zhengzhou 450052.
authors.forename: Y X
authors.initials: YX
authors.lastname: Jiang
authors.forename: X L
authors.initials: XL
authors.lastname: Dong
authors.forename: B F
authors.initials: BF
authors.lastname: Guo
authors.forename: H A
authors.initials: HA
authors.lastname: Li
mesh_terms: D000293:Adolescent; D000328:Adult; D001288:Attention; D002150:Caloric Tests; D004584:Electronystagmography; D006801:Humans; D008297:Male; D014722:Vestibule, Labyrinth / Q000502:physiology*