title: Cervical vestibular evoked myogenic potentials and caloric test results in individuals with auditory neuropathy spectrum disorders.
abstract: Auditory neuropathy spectrum disorder is a type of hearing loss where outer hair cell function are normal (as evidenced by the preservation of OAEs and cochlear microphonics), whereas auditory nerve functions are abnormal (as evidenced by abnormal auditory brainstem evoked potentials beginning with wave I of the ABR) and acoustic reflexes to ipsilateral and contralateral tones are absent. It is likely that in cases with auditory neuropathy spectrum disorder not only the cochlear nerve, but also the vestibular nerves might get involved. The present study was conducted with an aim of finding out the inferior and superior vestibular nerve involvement through cervical vestibular evoked myogenic potentials and Caloric test results respectively in individuals with Auditory Neuropathy Spectrum Disorders. Total 26 participants who fulfilled the criteria of auditory neuropathy spectrum disorder participated for the study. Vestibular evoked myogenic potentials results showed absence of responses from most of the subjects also caloric responses showed bilateral hypofunctional responses in most of the participants, which is suggestive of involvement of both the inferior as well as superior vestibular nerve in individuals with auditory neuropathy spectrum disorders. Additionally there was no association between the pattern and degree of hearing loss to caloric test results and vestibular evoked myogenic potentials results findings.
authors.affiliation: Department of Audiology, All India Institute of Speech and Hearing, Mysore, Karnataka, India.
authors.forename: Kumar Sinha
authors.initials: KS
authors.lastname: Sujeet
authors.affiliation: Department of Audiology, All India Institute of Speech and Hearing, Mysore, Karnataka, India.
authors.forename: Kumar Singh
authors.initials: KS
authors.lastname: Niraj
authors.affiliation: Department of Audiology, All India Institute of Speech and Hearing, Mysore, Karnataka, India.
authors.forename: Barman
authors.initials: B
authors.lastname: Animesh
authors.affiliation: Department of Otorhinolaryngology, All India Institute of Speech and Hearing, Mysore, Karnataka, India.
authors.forename: G
authors.initials: G
authors.lastname: Rajeshwari
authors.affiliation: Department of Audiology, All India Institute of Speech and Hearing, Mysore, Karnataka, India.
authors.forename: R
authors.initials: R
authors.lastname: Sharanya
mesh_terms: D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D002150:Caloric Tests; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology; D005260:Female; D006313:Hearing Loss, Central / Q000150:complications / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D058585:Vestibular Evoked Myogenic Potentials / Q000502:physiology*; D000160:Vestibulocochlear Nerve Diseases / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology; D055815:Young Adult
keywords: VEMP; Vestibular; caloric test; cochlear