In which pa of the semi circular canals is Calorie test based on thermal stimulation done?
Cold or warm water or air is irrigated into the external auditory canal, usually using a syringe. The temperature difference between the body and the injected water creates a convective current in the endolymph of the nearby horizontal semicircular canal. Hot and cold water produce currents in opposite directions and therefore a horizontal nystagmus in opposite directions Mnemonic used to remember the FAST direction of nystagmus is COWS (Cold-Opposite, Warm-Same) Cold water = FAST phase of nystagmus to the side Opposite from the cold water filled ear, Warm water = FAST phase of nystagmus to the same side as the warm water filled ear. Contralateral when cold is applied and ipsilateral when warm is applied
Lateral
Posterior
Anterior
All of the above