Potencial evocado miogênico vestibular ocular e cervical simultâneo em indivíduos normais

Silva, Tatiana Rocha; Resende, Luciana Macedo de; Santos, Marco Aurélio Rocha

doi:10.1590/2317-1782/20162015040

Cited by 8 publications

(33 citation statements)

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“…When the evoked potential changes from a prolonged latency to no response, 186 it is understood that there is a worsening in the neuronal damage [14,27,28]. This 187 pattern of response was previously observed in a cohort study of individuals infected by 188 HTLV-1 with myelopathy and asymptomatic carriers that were tested by cervical 189 VEMP [11].…”

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confidence: 83%

“…In this study, for cervical VEMP, we 115 considered the normal latency of 13 ms (+2.5 SD) for P13 and 23 ms (+2.5 SD) for 116 N23, while for ocular VEMP, we considered the normal latency of 10ms (+2.5 SD) for 117 N10 and 15ms (+2.5 SD) for P15 [25,26]. The validation of the analyzed reference 118 values was guaranteed by comparing these with parameters already established in other 119 national and international peer reviews [14,27,28].…”

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confidence: 99%

“…Each subject underwent at least 79 two stimulations per side, to verify the replication of the potential. The impedance 80 values, which had to be below 5 kiloohm (KΩ), were checked before each record [14].…”

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confidence: 99%

“…The recording of cervical VEMP and ocular VEMP was performed 82 simultaneously. Channel 1 electrodes were used to record ocular VEMP and channel 2 83 electrodes to record cervical VEMP [14]. 84 The active electrode related to cervical VEMP was placed on the opposite side at 85 the anterior border of the sternocleidomastoid muscle in its upper third, and the 86 reference electrode was placed in the sternal notch region.…”

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Ocular vestibular evoked myogenic potential (VEMP) reveals subcortical HTLV-1-associated neurological disease

Mar

Resende

et al. 2019

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Introduction: Vestibular Myogenic Evoked Potential (VEMP) evaluates vestibuloocular and vestibulospinal reflexes associated with posture. Purpose: To compare cervical and ocular VEMP in individuals with HTLV-1 associated myelopathy (HAM) and with HTLV-1-asymptomatic infection. Materials and Methods: This cross-sectional study included 52 HTLV-1-infected individuals (26 HAM and 26asymptomatic carriers) and 26 negative controls. The groups were similar regarding age and gender. Participants underwent ocular and cervical VEMP that were performed simultaneously. The stimulus used to generate VEMP was a sound, lowfrequency toneburst, intensity of 120 decibels normalized hearing level (dB nHL), bandpass filter from 10 to 1,500 Hz, with 100 stimuli at 500 Hertz (Hz) and 50 milliseconds (ms) recording time. An alteration in the electrophysiological waves 3 P13 and N23 for cervical VEMP and N10 and P15 waves for ocular VEMP was compared between groups. Results: Cervical VEMP was different among the groups for P13 (p=0.001) and N23 (p=0.003). Ocular VEMP was similar for N10 (p=0.375) and different for P15 (p=0.000). In the HTLV-1-asymptomatic group, 1(3.8%) individual presented changes in both ocular and cervical VEMP, while in HAM group, 16(61.5%) presented changes in both tests. Conclusion: Neurological impairment in HAM was not restricted to the spinal cord. The mesencephalic and thalamic connections, tested by ocular VEMP, were also altered. Damage of the oculomotor system, responsible for eye stabilization during head and body movements, may explain why dizziness is such a frequent complaint in HAM. Authors' summaryHuman T-cell lymphotropic virus type 1 (HTLV-1) infection is endemic in Brazil and can cause HTLV-1-associated myelopathy (HAM). This neurological disease progresses slowly and, within ten years after its onset, can confine the patient to a wheelchair. Changes in HAM inflammatory characteristics can subsequently occur in the cortex, subcortical white matter, cerebellum, and brainstem. In the present study, we used the electrophysiological test Vestibular Myogenic Evoked Potential (VEMP) to evaluate the thalamic, brainstem, and spinal neural connections. This test evaluates the peripheral and the central vestibular pathway and has been used to test the postural reflexes involved in the control of one's balance. The VEMP from 4 the oculomotor muscles demonstrated that a subcortical impairment occurs in HAM and can also occur in the asymptomatic phase of HTLV-1 infection. 1 Introduction 2 The Human T-cell lymphotropic virus type 1 (HTLV-1) infection affects 3 approximately 5-10 million people worldwide [1]. The majority of the infected 4 individuals remain asymptomatic throughout their lives [2]. The host genetic and 5 immunological factors seem to be related to the development of HTLV-1-associated 6 diseases [1,2].7The range of neurological manifestations of HTLV-1-associated myelopathy 8 (HAM) includes not only the spine, with the classical motor limitations affecting 9 the lower limbs, but also the autonomi...

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Ocular vestibular evoked myogenic potential (VEMP) reveals subcortical HTLV-1-associated neurological disease

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Resende

et al. 2019

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“…Vestibular-evoked myogenic potential (VEMP) is an electrophysiological method used to assess integration of the otolith organs and vestibular nerves with the brainstem and the muscular system. Therefore, it is a complementary exam that presents the differential of evaluating the central vestibular function, and it is related to a disynaptic reflex that has been considered to investigate brainstem function (1,2) .…”

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confidence: 99%

Aplicações dos potenciais evocados miogênicos vestibulares: revisão sistemática de literatura

Silva

Santos

Resende

et al. 2019

Audiol., Commun. Res.

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RESUMO Objetivos Revisar a literatura científica sobre as principais técnicas usadas para gerar o potencial evocado miogênico vestibular (VEMP) e suas aplicações clínicas. Estratégia de pesquisa Os artigos que descrevem os métodos de registro e as aplicações do VEMP foram localizados nas bases de dados PubMed, Web of Science, MEDLINE, Scopus, LILACS e SciELO. O levantamento realizado limitou-se aos artigos publicados nos idiomas Inglês, Português e Espanhol, entre janeiro de 2012 e maio de 2018. Critérios de seleção Artigos sobre os aspectos técnicos para a realização do VEMP ocular, cervical ou do músculo sóleo, com estimulação auditiva ou galvânica e artigos sobre as aplicações clínicas do VEMP foram incluídos; artigos repetidos nas bases de dados, artigos de revisão de literatura, relato de casos, cartas e editoriais foram excluídos. Resultados A estratégia de busca resultou na seleção de 28 artigos. Os estudos evidenciaram três métodos de registro do VEMP: cervical, ocular e no músculo sóleo. As aplicações clínicas do VEMP incluíram doença de Ménière, neurite vestibular, síndrome da deiscência do canal semicircular superior, doença de Parkinson, lesões centrais isquêmicas e mielopatias motoras. Conclusão Independentemente da técnica de registro, o VEMP mostrou-se útil como ferramenta complementar para o diagnóstico de doenças vestibulares periféricas e centrais.

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Evaluation of cervical vestibular miogenic evoked potential and electrococleography in the diagnosis of vestibular migraine

Rodrigues,

Silva,

de Sousa

et al. 2024

Brazilian Journal of Otorhinolaryngology

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Potencial evocado miogênico vestibular ocular e cervical simultâneo em indivíduos normais

Cited by 8 publications

References 18 publications

Ocular vestibular evoked myogenic potential (VEMP) reveals subcortical HTLV-1-associated neurological disease

Ocular vestibular evoked myogenic potential (VEMP) reveals subcortical HTLV-1-associated neurological disease

Aplicações dos potenciais evocados miogênicos vestibulares: revisão sistemática de literatura

Evaluation of cervical vestibular miogenic evoked potential and electrococleography in the diagnosis of vestibular migraine

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