This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
[{'content': 'In which pa of the semi circular canals is Calorie test based on thermal stimulation done? \nSelect and explain. \nA. Lateral, B. Posterior, C. Anterior, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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', 'role': 'assistant'}]