More than a 50% canal paresis is needed for the head impulse test to be positive.
Hamid
Mohamed
M
D002150:Caloric Tests; D004424:Ear Canal / Q000503:physiopathology*; D019416:Head Movements / Q000502:physiology*; D006801:Humans; D008307:Malleus / Q000601:surgery*; D008575:Meniere Disease / Q000175:diagnosis / Q000503:physiopathology; D009998:Ossicular Prosthesis; D010243:Paralysis / Q000175:diagnosis* / Q000503:physiopathology; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity; D014724:Vestibular Function Tests / Q000706:statistics & numerical data*