Caloric Tests In Deaf Children

Sandberg, Lars; Terkildsen, K.

doi:10.1001/archotol.1965.00750050361007

Cited by 46 publications

(21 citation statements)

References 8 publications

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“…Most of these mutants also suffer different degrees of degenera tion of the vestibular sensory cpithclia as well as concomi tant motor disturbances, as in the jerker mouse mutant for example [4], Hereditary' deafness in man is not associ ated with motor abnormalities [11], but that does not exclude these mutants as models of genetically induced deafness in humans. A reduced or an absent vestibular reaction has in fact been reported in some cases of heredi tary deafness in man [12][13][14], In mutant mice, allelic genes, i.e. different genes that occupy the same position on a defined chromosome, can give rise to offspring with hearing loss only or result in motor abnormalities in addi tion to the hearing loss [ 15,16], Thus, one type of change in the gene results for instance solely in cochlear defects, while a different change in the same gene can lead to motor abnormalities as well.…”

Section: Discussionmentioning

confidence: 99%

Cochlear Structure and Function in a Recessive Type of Genetically Induced Inner Ear Degeneration

Sjöström¹,

Anniko²

1992

ORL

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An age-related consecutive morphological analysis of the cochlea has been performed in homozygote (Je/Je) and heterozygote (je/+) jerker mouse mutants. A difference in the time of onset of hair cell pathology was evident between the two, but, when taking place, it showed a similar morphological type of degeneration. The cuticular plate and the stereocilia are particularly vulnerable structures and are the primary sites of damage. The suprastructures on both outer and inner hair cells disintegrate at the same time, irrespective of the level along the basilar membrane. During aging, the je/+ animals showed a progressive age-related impairment of auditory brainstem response thresholds which was correlated semiquantitatively to hair cell pathology.

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Section: Discussionmentioning

confidence: 99%

Cochlear Structure and Function in a Recessive Type of Genetically Induced Inner Ear Degeneration

Sjöström¹,

Anniko²

1992

ORL

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“…It is interesting that vestibular function proved normal in 80 % of individuals with a hearing loss of less than 90 dB, as opposed to only 20 % of those whose hearing loss exceeded 98 dB. Vestibular function appears, therefore, to be normal up to a point at which acoustic function has been almost entirely lost [11].…”

Section: Hearing Lossmentioning

confidence: 96%

“…This hypothesis is supported by studies which show that vestibular dysfunction has a high frequency (up to 80 %) in children with severe hearing impairment [7][8][9][10][11][12][13]. The methods used involved assessment of either postrotatory or caloric nystagmus.…”

Section: Introductionmentioning

confidence: 94%

“…Only the correlation between hearing loss and caloric testing was incorporated into certain studies, although no absolute correlation was found [8,10,11,13].…”

Section: Hearing Lossmentioning

confidence: 99%

“…Sandberg und Terkildsen divided their 57 subjects into three groups on the basis of average auditory threshold (<90dB, 91-97dB, >98dB), with vestibular deficits (caloric) detectable in 20, 50 and 80 % of cases respectively [11]. Potter and Silverman observed hypoactive (postrotatory) vestibular responses in just under 60 % of their test population, 34 deaf children [9] whereas Horak et al (1988) cite a figure of 66 % [6].…”

Section: Caloric Excitabilitymentioning

confidence: 99%

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Influencing Factors on the Vestibular Function of Deaf Children and Adolescents - Evaluation by Means of Dynamic Posturography

Schwab

Kontorinis²

2011

TOOTORJ

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Abstract:Objectives: Previous studies have shown that both motor exercises and vestibuloocular tests reveal a difference in the balance function of deaf and normal-hearing children and adolescents.The purpose is to evaluate the influence on balance function of the hearing status. Material and Methods:A total of 80 children and adolescents between the ages of 4 and 20 years were studied. Of these, 40 children were either deaf or severely hearing impaired. The remaining 40 were control subjects of equivalent age without hearing or balance impairment.The EquiTest ® , a device used in computerized dynamic posturography, was employed for the investigations. Mean equilibrium and latency scores from both groups were compared using t-tests for unrelated random samples. Results:The deaf children achieved significantly lower equilibrium scores and latency scores than the control group. A positive linear relationship exists between the age of the subjects and the equilibrium scores obtained. Gender, extent of hearing loss and cause of deafness have no significant effect on the balance function of the deaf children. Deaf subjects with normal caloric excitability achieved significantly higher equilibrium scores than those with vestibular deficits. Conclusions:The results support the hypothesis that damage to the cochlea, whatever its cause, may also detrimentally affect the vestibular organ. They do not, however, exclude the possibility that the poorer balance proficiency shown by deaf children may have other possible causes, such as CNS damage.The fact that equilibrium scores increase with increasing age can be seen as indicating the maturation of central nervous mechanisms involved in integrating the various sensory qualities in the sense of balance.An improvement in vestibular function through special training appears plausible, although this would necessitate diagnosis at a very early stage.

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Value of Vestibular Testing in Young Children With Sensorineural Hearing Loss

Angeli

2003

Arch Otolaryngol Head Neck Surg

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Caloric Tests In Deaf Children

Cited by 46 publications

References 8 publications

Cochlear Structure and Function in a Recessive Type of Genetically Induced Inner Ear Degeneration

Cochlear Structure and Function in a Recessive Type of Genetically Induced Inner Ear Degeneration

Influencing Factors on the Vestibular Function of Deaf Children and Adolescents - Evaluation by Means of Dynamic Posturography

Value of Vestibular Testing in Young Children With Sensorineural Hearing Loss

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