Combined ocular and cervical vestibular evoked myogenic potential in individuals with vestibular hyporeflexia and in patients with Ménière's disease.
BACKGROUND
The vestibular evoked myogenic potential is a potential of mean latency that measures the muscle response to auditory stimulation. This potential can be generated from the contraction of the sternocleidomastoid muscle and also from the contraction of extraocular muscles in response to high-intensity sounds. This study presents a combined or simultaneous technique of cervical and ocular vestibular evoked myogenic potential in individuals with changes in the vestibular system, for use in otoneurologic diagnosis.


OBJECTIVE
To characterize the records and analyze the results of combined cervical and ocular VEMP in individuals with vestibular hyporeflexia and in those with Ménière's disease.


METHODS
The study included 120 subjects: 30 subjects with vestibular hyporeflexia, 30 with Ménière's disease, and 60 individuals with normal hearing. Data collection was performed by simultaneously recording the cervical and ocular vestibular evoked myogenic potential.


RESULTS
There were differences between the study groups (individuals with vestibular hyporeflexia and individuals with Ménière's disease) and the control group for most of wave parameters in combined cervical and ocular vestibular evoked myogenic potential. For cervical vestibular evoked myogenic potential, it was observed that the prolongation of latency of the P13 and N23 waves was the most frequent finding in the group with vestibular hyporeflexia and in the group with Ménière's disease. For ocular vestibular evoked myogenic potential, prolonged latency of N10 and P15 waves was the most frequent finding in the study groups.


CONCLUSIONS
Combined cervical and ocular vestibular evoked myogenic potential presented relevant results for individuals with vestibular hyporeflexia and for those with Ménière's disease. There were differences between the study groups and the control group for most of the wave parameters in combined cervical and ocular vestibular evoked myogenic potential.
Universidade Federal de Minas Gerais (UFMG), Faculdade de Medicina, Programa de Pós-graduação em Ciências Fonoaudiológicas, Belo Horizonte, MG, Brazil. Electronic address: tatiana.rochas@gmail.com.
Tatiana Rocha
TR
Silva
Universidade Federal de Minas Gerais (UFMG), Faculdade de Medicina, Departamento de Fonoaudiologia, Belo Horizonte, MG, Brazil.
Luciana Macedo
LM
de Resende
Universidade Federal de Minas Gerais (UFMG), Faculdade de Medicina, Programa de Pós-graduação em Ciências Fonoaudiológicas, Belo Horizonte, MG, Brazil.
Marco Aurélio Rocha
MAR
Santos
D000293:Adolescent; D000328:Adult; D002574:Cervical Vertebrae / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008575:Meniere Disease / Q000503:physiopathology*; D008875:Middle Aged; D012021:Reflex, Abnormal / Q000502:physiology*; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D058585:Vestibular Evoked Myogenic Potentials / Q000502:physiology*; D014724:Vestibular Function Tests; D055815:Young Adult
Doenças vestibulares; Labyrinth vestibule; Motor evoked potential; Nervo vestibular; Potencial evocado motor; Saccule and utricle; Sáculo e utrículo; Vestibular disorders; Vestibular nerve; Vestíbulo do labirinto