caloric test


Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.

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 caloric test is a reliable test that has been used for many years.
One of the issues that is being investigated today is whether these tests can be used in place of the caloric test.
While the caloric test assesses the rotational VOR system through the canal-ocular reflex, o-VEMP evaluates the translational VOR system through the otolithic-ocular reflex (8).
11) found a strong correlation between o-VEMP responses and caloric test responses in patients with Meniere's disease.
However, unlike the caloric test, it has a higher frequency, and thus, it is a more physiological measurement (12, 13).
5) reported that v-HIT results did not correlate with the caloric test results and that v-HIT is not sensitive to peripheral vestibular diseases.
In our study, when we compared the V-HIT test results with the caloric test results, we obtained findings consistent with those in the literature.
Among the 16 cases whose tumors originated from SVN, 12 showed normal VEMP and abnormal caloric tests, the rest showed both abnormal VEMP and caloric tests.
In this study, we investigated whether vestibular testing such as VEMP or caloric tests are predictive of the nerve of origin for VS and postoperative hearing preservation.
In conclusion, this study indicated that the results of VEMP and caloric tests in patients with VS could be used to identify the nerve origin of the tumor.