scholarly journals Investigation of Balance Function Using Dynamic Posturography under Electrical-Acoustic Stimulation in Cochlear Implant Recipients

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
B. Schwab ◽  
M. Durisin ◽  
G. Kontorinis
Keyword(s):  
Cochlear Implant ◽  
Vestibular System ◽  
Sensory Analysis ◽  
Vestibular Function ◽  
Acoustic Stimulation ◽  
Balance Function ◽  
Dynamic Posturography ◽  
Balance System ◽  
Test Population ◽  
Static Conditions

Introduction. The purpose of the present study is to investigate the effect of electrical-acoustic stimulation on vestibular function in CI patients by using the EquiTest and to help answer the question of whether electrically stimulating the inner ear using a cochlear implant influences the balance system in any way.Material and Methods. A test population () was selected at random from among the cochlear implant recipients. Dynamic posturography (using the EquiTest) was performed with the device switched off an switched on.Results. In summary, it can be said that an activated cochlear implant affects the function of the vestibular system and may, to an extent, even lead to a stabilization of balance function under the static conditions of dynamic posturography, but nevertheless also to a significant destabilization. Significant improvements in vestibular function were seen mainly in equilibrium scores under conditions 4 and 5, the composite equilibrium score, and the vestibular components as revealed by sensory analysis.Conclusions. Only under the static conditions are significantly poorer scores achieved when stimulation is applied. It may be that the explanation for any symptoms of dizziness lies precisely in the fact that they occur in supposedly noncritical situations, since, when the cochlear implant makes increased demands on the balance system, induced disturbances can be centrally suppressed.

scholarly journals Balance function after cochlear implant and inner ear anomaly: Comparison of dynamic posturography

2020 ◽  
Vol 5 (3) ◽  
pp. 529-535
Author(s):  
Farideh Hosseinzadeh ◽  
Alimohamad Asghari ◽  
Maziar Moradi‐Lakeh ◽  
Mohammad Farhadi ◽  
Ahmad Daneshi ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Inner Ear ◽  
Balance Function ◽  
Dynamic Posturography ◽  
Inner Ear Anomaly

The maturation of balance in children

2006 ◽  
Vol 121 (5) ◽  
pp. 449-454 ◽  
Author(s):  
V L Cumberworth ◽  
N N Patel ◽  
W Rogers ◽  
G S Kenyon
Keyword(s):  
Vestibular Function ◽  
Position Sense ◽  
Healthy Children ◽  
Balance Function ◽  
Dynamic Posturography ◽  
Age Related ◽  
Infancy And Childhood ◽  
Related Development ◽  
Age Range ◽  
Somatosensory Function

Background: Balance function is known to change with age during infancy and childhood. However, the relative contributions of the three primary inputs to position sense are not fully understood.Methods: In this paper we report the computerised dynamic posturography findings in a group of 60 healthy children from the age of five to 17.Results: The results confirm that there is a progressive improvement in balance function with age. The EquiTest system that was used gave indications of the relative contributions of the three principal contributors to overall balance function and showed that somatosensory function was intact throughout the age range tested and that there are significant increases in vestibular function with age and visual contribution with height. The technique used was found to be reliable and repeatable in this paediatric sample.Conclusions: It is hoped that a better understanding of the normal age related development of balance will be helpful in dealing with children presenting with disequilibrium and vertigo.

Caloric response does not decline with age

2004 ◽  
Vol 14 (5) ◽  
pp. 393-396
Author(s):  
A.I. Mallinson ◽  
N.S. Longridge
Keyword(s):  
Vestibular System ◽  
Vestibular Function ◽  
The Elderly ◽  
Slow Phase ◽  
Balance System ◽  
Age Related ◽  
Dependent Change ◽  
Physiologic Function ◽  
Caloric Response ◽  
Anatomical Evidence

Complaints of imbalance in the elderly are commonly heard by clinicians, and pathology of the vestibular system may play an important role in these complaints. While there is solid anatomical evidence for age related decline of some vestibular structures, a corresponding deterioration in physiologic function has not been convincingly demonstrated. Vestibular function is traditionally measured with caloric irrigations. Although there has been some age dependent change in caloric response shown, there is no good parallel between caloric response and imbalance in the elderly patient. Our experiment confirms that slow phase velocity of caloric responses does not decline with age. Calorics measure only one part of the vestibular system, and so should not be regarded as representative of balance system function. As a result, measured caloric response does not parallel documented anatomic age-related decline of the vestibular system.

scholarly journals Using Interleaved Stimulation to Measure the Size and Selectivity of the Sustained Phase-Locked Neural Response to Cochlear Implant Stimulation

2021 ◽  
Author(s):  
Robert P. Carlyon ◽  
François Guérit ◽  
John M. Deeks ◽  
Andrew Harland ◽  
Robin Gransier ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Group Delay ◽  
Acoustic Stimulation ◽  
Neural Response ◽  
Clinical Applications ◽  
Pulse Trains ◽  
Charge Integration ◽  
Recording Electrodes ◽  
Time Point ◽  
Do So

AbstractWe measured the sustained neural response to electrical stimulation by a cochlear implant (CI). To do so, we interleaved two stimuli with frequencies F1 and F2 Hz and recorded a neural distortion response (NDR) at F2-F1 Hz. We show that, because any one time point contains only the F1 or F2 stimulus, the instantaneous nonlinearities typical of electrical artefact should not produce distortion at this frequency. However, if the stimulus is smoothed, such as by charge integration at the nerve membrane, subsequent (neural) nonlinearities can produce a component at F2-F1 Hz. We stimulated a single CI electrode with interleaved sinusoids or interleaved amplitude-modulated pulse trains such that F2 = 1.5F1, and found no evidence for an NDR when F2-F1 was between 90 and 120 Hz. However, interleaved amplitude-modulated pulse trains with F2-F1~40 Hz revealed a substantial NDR with a group delay of about 45 ms, consistent with a thalamic and/or cortical response. The NDR could be measured even from recording electrodes adjacent to the implant and at the highest pulse rates (> 4000 pps) used clinically. We then measured the selectivity of this sustained response by presenting F1 and F2 to different electrodes and at different between-electrode distances. This revealed a broad tuning that, we argue, reflects the overlap between the excitation elicited by the two electrodes. Our results also provide a glimpse of the neural nonlinearity in the auditory system, unaffected by the biomechanical cochlear nonlinearities that accompany acoustic stimulation. Several potential clinical applications of our findings are discussed.

Effects of Dancing Career on the Balance Function of Vestibular System in Elementary Schools

2002 ◽  
Vol 18 ◽  
pp. 1067-1076
Author(s):  
Tae Young Kim ◽  
Mi Ran Kwak
Keyword(s):  
Elementary Schools ◽  
Vestibular System ◽  
Balance Function

Effect of using smart phones on balance functions

QJM ◽  
2021 ◽  
Vol 114 (Supplement_1) ◽  
Author(s):  
N Hazzaa ◽  
DM Hassan ◽  
Sh Mahmoud
Keyword(s):  
Healthy Subjects ◽  
Smart Phone ◽  
Balance Function ◽  
Visual Fatigue ◽  
Vestibular Disorder ◽  
Dynamic Posturography ◽  
Group I ◽  
Significant Difference ◽  
Group Ii ◽  
Composite Scores

Abstract Objective To investigate the effect of visual fatigue caused by smart phone on the balance function. Subjects and Methods Forty subjects divided into 2 groups were included in the present study . Group I, twenty normal healthy subjects with mean age of 28.8 years. Group II, twenty subjects with a clinical diagnosis of peripheral vestibular disorder with mean age of 38.85years. They were subjected to a computer vision syndrome questionnaire (CVS-Q) , occulomotor tests of videonystagmography (VNG) and sensory organization test (SOT) of computerized dynamic posturography (CDP) before and after visual fatigue induction. Results Significant differences existed between C5, 6 and composite scores in group I and in C4 and composite scores in group II after visual fatigue induction. However, there was no significant difference between occulomotor tests in both groups after visual fatigue induction. Conclusions The smart phone use can affect the balance function in healthy subjects and augment the deficit in those with balance problem. Reducing visual fatigue should be considered through various procedures as taking proper rest, adjusting the brightness of screen, avoid any wrong posture and using filters if possible.

A Role for Acoustic Stimulation in Advanced Otosclerosis: Direct Acoustic Cochlear Implant versus Cochlear Implant

2018 ◽  
Vol 23 (2) ◽  
pp. 89-97
Author(s):  
Nicolas Verhaert ◽  
Charlotte Borgers ◽  
Katleen De Voecht ◽  
Ellen Boon ◽  
Christian Desloovere
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Hearing Aids ◽  
Standard Treatment ◽  
Acoustic Stimulation ◽  
Grading System ◽  
Effective Treatment Option ◽  
Computed Tomographic ◽  
Direct Acoustic Cochlear Implant ◽  
Acoustic Component

Recent findings support the efficacy of the direct acoustic cochlear implant (DACI) in patients with advanced otosclerosis whose rehabilitation is very challenging. Standard treatment consists of stapes surgery combined with hearing aids or a cochlear implant (CI). CI surgery, however, is often challenging depending on the grade of otosclerosis. This study aims to compare speech perception scores in quiet and noise of 6 DACI and 12 CI patients with advanced otosclerosis at 3 and 12 months after fitting. Preoperative computed tomographic scans of all patients were scored by experts using an existing otosclerosis grading system (stages 1–3). Speech perception in quiet was significantly better for DACI compared to CI users at 3 months after fitting. At 12 months, no difference was found between DACI and CI patients. Speech perception scores in noise were significantly better in the DACI group. In summary, a DACI system seems to provide an effective treatment option as the acoustic component can be preserved in patients with advanced otosclerosis.

scholarly journals Postural control during dual task in adolescent cochlear implant users under on/off-device conditions

2021 ◽  
Author(s):  
Zahra Nadimi ◽  
Mansoureh Adel Ghahraman ◽  
Ghassem Mohammadkhani ◽  
Reza Hoseinabadi ◽  
Shohreh Jalaie ◽  
...  
Keyword(s):  
Postural Control ◽  
Cochlear Implant ◽  
Vestibular System ◽  
Dual Task ◽  
Cognitive Task ◽  
Normal Hearing ◽  
Hearing Impaired ◽  
Caloric Test ◽  
Vestibular Disorders ◽  
Control Performance

Background and Aim: Vestibular system has several anatomical connections with cognitive regions of the brain. Vestibular disorders have negative effects on cognitive performance. Hearing-impaired patients, particularly cochlear implant users, have concomitant vestibular disor­ders. Previous studies have shown that attention assigned to postural control decreases while per­forming a cognitive task (dual task) in hearing-impaired children. Since the vestibular system and postural control performance develop around 15−16 years of age, the aim of this study was to compare postural control performance during dual task in adolescent boys with normal hearing and cochlear implant (CI) users with congenital hearing-impairment. Methods: Postural control was assessed in twenty 16−19 year old cochlear implant boys and 40 normal hearing peers with force plate. The main outcomes were displacement in posterior- anterior and medial-lateral planes, and mean speed with and without cognitive task and under on/off-device conditions. Caloric test was per­formed for CI users in order to examine the peri­pheral vestibular system. Results: Ninety-five percent of CI users showed caloric weakness. There were no significant diff­erences in postural control parameters between groups. All performances deteriorated in the foam pad condition compared to the hard surface in all groups. Total mean velocity significantly increased during dual task in normal hearing group and in CI users with off-device. Conclusion: Although CI users had apparent vestibular disorders, their postural control in both single and dual-task conditions was identical to the normal peers. These effects can be attributed to the vestibular compensation that takes place during growing. Keywords: Balance; postural control; dual task; congenital hearing loss; cochlear implant

Significance of Vestibular Function in Cochlear Implant Patients

2000 ◽  
pp. 176-179
Author(s):  
T. Kubo ◽  
K.-i. Yamamoto ◽  
Y. Mamoto ◽  
T. Iwaki
Keyword(s):  
Cochlear Implant ◽  
Vestibular Function

scholarly journals Sensitivity to interaural time differences and localization accuracy in cochlear implant users with combined electric-acoustic stimulation

PLoS ONE ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. e0241015
Author(s):  
Monika Körtje ◽  
Uwe Baumann ◽  
Timo Stöver ◽  
Tobias Weissgerber
Keyword(s):  
Cochlear Implant ◽  
Acoustic Stimulation ◽  
Interaural Time Differences ◽  
Localization Accuracy ◽  
Electric Acoustic Stimulation
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