caloric test


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caloric

 [kah-lor´ik]
pertaining to heat or to calories.
caloric test a test of third, sixth, and eighth cranial nerves. Irrigation of the normal ear with warm water produces caloric nystagmus toward the irrigated side; irrigation with cold water produces similar nystagmus away from that side. Called also oculovestibular test.

Bá·rá·ny ca·lor·ic test

(bah'rah-nē),
a test for vestibular function, made by irrigating the external auditory canal with cool and warm water; this thermal stimulation of the vestibular apparatus results in nystagmus and past-pointing; in vestibular disease, the response may be reduced or absent.

caloric test

a procedure in which the ear canal is alternately irrigated with warm water or air and cold water or air. The warm irrigation produces a rotatory nystagmus toward the irrigated side. Cold irrigation produces a rotatory nystagmus away from the irrigated side. If the vestibular portion of the ear is normal, all irrigations will produce nystagmus that is approximately equal in intensity. If the vestibular portion of the ear is diseased, irrigation may produce less nystagmus than would occur in the normal ear. Also called Bárány's test. See also electronystagmography.

caloric test

Neurology A test of vestibular function in which the ear canal is irrigated with cold and hot water, which often identifies an impairment or loss of thermally induced nystagmus on the involved side; the use of thermic stimuli to induce endolymphatic flow in the horizontal semicircular canal and horizontal nystagmus by creating a temperature gradient between the 2 sides of the canal

caloric test

A test of the balancing mechanisms in the inner ear. Instillation of hot and cold water into the ear causes jerky movement of the eyes (NYSTAGMUS) if the vestibular apparatus is functioning normally. If, however, there is disease of the balancing mechanism (semicircular canals) the nystagmus will be absent or much reduced in extent.

Bárány,

Robert, Austrian-Hungarian otologist and Nobel laureate, 1876-1936.
Bárány alarm apparatus
Bárány apparatus
Bárány box
Bárány caloric test - a test for vestibular function. Synonym(s): caloric test; nystagmus test
Bárány chair
Bárány noise apparatus
Bárány noise apparatus whistle
Bárány sign - nystagmus induced by injecting either hot or cold water into the external ear canal in the caloric test.
Bárány syndrome - the direction of a fall is influenced by changing head position in the presence of equilibrium disturbance.
Bárány test
positional vertigo of Bárány - brief attacks of paroxysmal vertigo and nystagmus due to labyrinthine dysfunction. Synonym(s): benign positional vertigo

caloric

pertaining to heat or to calories.

caloric density
measure of the energy contained in food, usually quantified as calories or joules, per unit mass of food.
caloric exhaustion
caloric homeostasis
process of regulation of energy intake from food to sustain energy balance.
caloric intake
measure of amount of food energy as calories eaten by an animal.
caloric requirements
see energy requirements.
caloric test
irrigation of the external ear canal with hot or very cold water will stimulate the flow of endolymph and will cause nystagmus if the vestibular system and brainstem are intact.
References in periodicals archive ?
The alternate binaural bithermal (ABB) caloric test, when corrected for the preexisting nystagmus, did not induce any left-beating nystagmus.
A caloric test, in which water at different temperatures is poured into the ear to check on the vestibular apparatus.
The caloric test is very important because this is the only vestibular test that can test one side at a time.