Caloric testing is a useful clinical too

Caloric testing is a useful clinical tool that can assess and quantify the functional status of the individual vestibular systems.⁣

Ice 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. ⁣

If the water is warm (44 °C or above) endolymph in the ipsilateral horizontal canal rises,with horizontal nystagmus (quick horizontal eye movements) to the ipsilateral ear.⁣

From: @rjd_medix ⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣

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