In cold caloric stimulation test, the cold water induces movement of the eyeball in the following direction
Correct Answer: Towards the opposite side
Description: When Ice cold or warm water or air is irrigated into the external auditory canal, the temperature difference between the body and the injected water creates a convective current in the endolymph of the nearby horizontal semicircular canal. If the water is cold relative to the body temperature (30degC or below), the endolymph falls within the semicircular canal decreasing the rate of vestibular afferent firing. The eyes then turn toward the ipsilateral ear with horizontal nystagmus to the contralateral ear. (Ref: Diseases of EAR, NOSE AND THROAT by PL DHINGRA - 6th Edition)
Category:
ENT
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