Cochlear Implantation Rarely Alters Horizontal Vestibulo-ocular Reflex in Motorized Head Impulse Test

Abstract

Late high-frequency loss of vestibular function or vestibular symptoms is rare but possible after cochlear implantation surgery. This should be taken into account in patient counseling especially when considering bilateral cochlear implant surgery.

Preliminary results of video Head Impulse Testing (vHIT) in children with cochlear implants

“…This is consistent with studies in adult, unilaterally implanted patients [24,25], and also with research in children: investigating low frequencies of LSC function stimulation by means of M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 8 caloric testing in unilaterally implanted children, Cushing et al [21,26,27] found no significant differences between implanted and contralateral ear.…”

Vestibular function in cochlear implantation: Correlating objectiveness and subjectiveness

“…Furthermore, previous reports have not shown a significant change in vHIT gain before and after CI. 18 In contrast, the authors of the present study believe that examining gain alone may not represent all of the physiologic changes occurring after CI because the presence of saccadic abnormalities may exist. Moreover, previous research has demonstrated that the injury in the vestibular system in some patients is not enough to decrease objective vestibular function (i.e., caloric response or vHIT gain).…”

Meta‐analysis of subjective complaints of vertigo and vestibular tests after cochlear implantation

“…Nystagmography and cVEMP tests revealed a significant increase of the hSCC and saccular impairment after cochlear implantation. Further vestibular tests were rare or reported without sufficient data and therefore not systematically evaluated (e.g., head impulse test, 5,20,23,25,30,61,63,[88][89][90][91][92][93][94][95] subjective haptic vertical testing, 15,89 and ocular vestibular-evoked myogenic potentials 8,25,80,92,96 ).…”