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:: Volume 21, Issue 1 (30 2012) ::
aud 2012, 21(1): 17-25 Back to browse issues page
Comparison acoustically evoked short latency negative response with vestibular evoked myogenic potential in adults with profound hearing loss
Seyede Nazanin Hajari1, Abdolreza Sheibanizadeh 1, Akram Pourbakht1, Homa Zarrinkoub2, Mohammad Kamali3, Maryam Ramezani1
1- Department of Audiology, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran
2- DepartmentDepartment of Audiology,Faculty of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3- Department of Rehabilitation Management, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran
Abstract:   (6651 Views)

Background and Aim: A negative deflection with a 3-4 ms latency period has been reported to exist within the auditory brainstem response of some patients with profound hearing loss following a strong acoustic stimulus. This deflection, namingly the n3 or the acoustically evoked short latency negative response is assumed to be a vestibular-evoked potential, especially of saccular origin. Since the myogenic potential is also saccular in origin, the purpose of the present study was to investigate the relationship between these two tests in adults with profound hearing loss.
Methods: The present cross sectional study was performed on 20 profoundly deaf volunteers(39 ears) who aged between 18-40 years old, randomly selected from available deaf adults in Tehran. The auditory brainstem response of all subjects was recorded following a 1000 Hz tone burst in 70-100dB nHL. Subjects were also tested for vestibular evoked myogenic potential.
Results: Only 34 of 39 ears recorded myogenic potential that negative response was recorded in 27 of 34 ears with normal p13 and n23. In seven ears with normal p13 and n23, the negative response was absent. In 3 ears with no p13 and n23, the negative response was observed, and two none.
Conclusion: In view of the high prevalance of the negative response in profoundly deaf ears with normal p13 and n23, it could be concluded that the negative response can be used when for any reason, it is not possible to record myogenic potential and be considered as a new test in vestibular test battery.

Keywords: Vestibular evoked myogenic potential, evoked short latency negative response, n3 potential, succulus, profound hearing loss
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Type of Study: Research |
Received: 2011/04/4 | Accepted: 2011/09/5 | Published: 2013/10/14
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Volume 21, Issue 1 (30 2012) Back to browse issues page
شنوایی شناسی - دانشگاه علوم پزشکی تهران Bimonthly Audiology - Tehran University of Medical Sciences
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