Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/112127
Title: Differences in Vestibular-Evoked Myogenic Potential Responses by Using Cochlear Implant and Otolith Organ Direct Stimulation
Authors: Rodríguez Montesdeoca, Isaura 
Ramos De Miguel, Ángel 
Falcon Gonzalez, Juan Carlos 
Borkoski Barreiro, Silvia 
Perez Fernandez, Nicolas
Vanspauwen, Robby
Ramos Macías, Ángel Manuel 
UNESCO Clasification: 32 Ciencias médicas
241113 Fisiología de la audición
Keywords: Electrical stimulation
Vestibular implant
Balance
Bilateral vestibulopathy
Vestibulo-collic reflex, et al
Issue Date: 2021
Project: European development of Bionics Vestibular implant for Bilateral Vestibular dysfunction 
Journal: Frontiers in Neurology 
Abstract: Objective: Several studies have demonstrated the possibility to obtain vestibular potentials elicited with electrical stimulation from cochlear and vestibular implants. The objective of this study is to analyze the vestibular-evoked myogenic potentials (VEMPs) obtained from patients implanted with cochlear and vestibulo-cochlear implant. Material and Methods: We compared two groups: in the first group, four cochlear implant (CI) recipients with present acoustic cVEMPs before CI surgery were included. In the second group, three patients with bilaterally absent cVEMPs and bilateral vestibular dysfunction were selected. The latter group received a unilateral cochleo-vestibular implant. We analyze the electrically elicited cVEMPs in all patients after stimulation with cochlear and vestibular electrode array stimulation. Results: We present the results obtained post-operatively in both groups. All patients (100%) with direct electrical vestibular stimulation via the vestibular electrode array had present cVEMPs. The P1 and N1 latencies were 11.33–13.6 ms and 18.3–21 ms, respectively. In CI patients, electrical cVEMPs were present only in one of the four subjects (25%) with cochlear implant (“cross”) stimulation, and P1 and N1 latencies were 9.67 and 16.33, respectively. In these patients, the responses present shorter latencies than those observed acoustically. Conclusions: Electrically evoked cVEMPs can be present after cochlear and vestibular stimulation and suggest stimulation of vestibular elements, although clinical effect must be further studied.
URI: http://hdl.handle.net/10553/112127
ISSN: 1664-2295
DOI: 10.3389/fneur.2021.663803
Source: Frontiers in Neurology [ISSN 1664-2295], n. 25
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