:: Volume 20, Issue 1 (27 2011) ::
aud 2011, 20(1): 96-106 Back to browse issues page
Vestibular evoked myogenic potential in congenitally blind patients versus normal subjects
Sahar Shomeil Shushtary1, Mansoureh Adel Ghahraman 1, Mahin Sedaie1, Saeed Talebian2, Shohreh Jalaie3, Mojtaba Tavakoli4
1- Department of Audiology, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran
2- Department of Physiotherapy, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran
3- Department of Biostatistics, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran
4- Department Department of Audiology, Faculty of Rehabilitation, Jondishapour University of Medical Sciences, Ahwaz, Iran
Abstract:   (8806 Views)

Background and Aim: Conventional balance tests such as electronystagmography and videonystagmography, which are vision-dependant, are not practical in blind patients. Instead, vestibular evoked myogenic potential , not needing any vision, seems to be a more appropriate test for evaluating the vestibular system, in these patients. This study aimed to assess the prevalence and the latencies of p13 and n23 waves among congenitally blind and sighted participants evaluated by vestibular evoked myogenic potential.
Methods: In a cross-sectional study, vestibular evoked myogenic potential was recorded for 20 sighted and 20 congenitally blind subjects, aged 18 to 30 years old, using 500 Hz-tone bursts (95 dBnHL).
Results: Vestibular evoked myogenic potentials responses were present in all (100%) of the participants. Considering the results of the both ears, there was no significant difference between mean p13 and n23 latencies of the two groups (p>0.05).
Conclusion: Formation of vestibular evoked myogenic potentials reflex arc and neural pathway in congenitally blind patients is similar to sighted individuals hence, the development of this pathway is independent of the visual system. Vestibular evoked myogenic potentials test is a useful test to assess vestibular function of the blinds.

Keywords: Vestibular evoked myogenic potential, sternocleidomastoid muscle, congenital blindness
Full-Text [PDF 234 kb]   (3265 Downloads)    
Type of Study: Research |
Received: 2010/05/3 | Accepted: 2010/09/5 | Published: 2013/10/14


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Volume 20, Issue 1 (27 2011) Back to browse issues page