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Results for “VESTIBULAR FUNCTION TESTS”

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At least 811 records · Page 45Linked to original sources
PubMed1995

Evaluation of imbalance of the vestibulo-spinal reflex by "the circular walking test".

A sensitive method of demonstrating latent imbalance of labyrinthine function was devised. The subject was asked to walk at his or her usual speed with eyes closed in a circle 2 m in diameter. This test was done by 22 patients whose vestibular function as tested by the Romberg, Mann, Fukuda and Babinski-Weil's methods had become normal after an attack of vertigo due to unilateral vestibular disorder. Eighteen patients complained of difficulty in walking while turning toward the affected side, and 11 tended to fall to the inside of the circle. Turning in the opposite direction, however, was performed without any difficulty. It was thought that disorders of the cristospinal reflex became manifest during circular walking toward the affected side. The body is inclined to the inner side of circular walking. Endolymph flows toward the ampulla of the lateral semicircular canal on the same side as turning. This would exert a facilitatory action on extensor neurons and give the ipsilateral leg assistance for supporting the body's weight which shifts to the centre of the circle. Disorders of the cristospinal reflex would cause difficulty in circular walking toward the affected side.

Humans↗
PubMed2004

Function of semicircular canals, utricles and saccules in deaf children.

OBJECTIVE: To study vestibular function in deaf children. MATERIAL AND METHODS: In 36 deaf children the function of the semicircular canals, saccules and utricles was measured by means of caloric testing, recordings of vestibular-evoked myogenic potentials (VEMPs) and measurements of the subjective visual horizontal (SVH) at different body tilts, respectively. RESULTS: In total, 30% of subjects had caloric hypo- or areflexia and 24% had a caloric asymmetry. VEMPs were weak or absent bilaterally in 22% of cases, and asymmetric in 19%. Regarding the utricle, 17% of subjects had a pathologically reduced perception of roll tilt to both sides and 25% had an asymmetry. In total, 30% of subjects were pathologic in all 3 tests and 30% were completely normal. Semicircular canal function correlated best with the function of the saccule. If hearing was better than 90 dB (pure-tone average of 0.5, 1.0 and 2.0 kHz) vestibular function was often normal. For hearing levels of 100-120 dB, otolith function declined significantly. CONCLUSIONS: Vestibular function tends to be preserved up to a point where hearing is nearly extinct. Hearing level correlates more closely with otolith function, especially that of the utricle, than with semicircular canal function.

Adolescent↗