<prompt> Caloric test assesses the function ofVentral semicircular canalAnterior semicircular canalLateral semicircular canalPosterior semicircular canal  <response>: Ans. c Lateral semicircular canal Ref. Bhargava 5th Ed, 36; Dhingra 4th ed., 43CALORIE TEST HALLPIKE TEST To test vestibular function by stimulating the Labyrinth by water of 30degC cold and 44degC hot. Position of patient: Head raised to 30deg from horizontal in supine position to bring horizontal semicircular canal in vertical position. Inference: Nystagmus produced COWS.WaterNystagmusCold 30degCOpposite SideWarm 44degCSame SideInterpretationa Normal: Time taken from start of irrigation to end point of Nystagmus is taken and it is 80-120 seconds.b Canal paresis:Duration of Nystagmus shortened, i.e., 80 sec.Indicates depressed function of ipsilateral Labyrinth, vestibular nerve and vestibular nuclei.Seen in:1. Menieres disease; 2. Acoustic neuroma; 3. Vestibular neuritis 4. Vestibular nerve section; 5. Postural vertigoDirectional preponderance: Duration of Nystagmus increases, i.e., 120 sec. 