Saccular Origin of Acoustically Evoked Short Latency Negative Response

Nong, Dong X.; Ura, Masaharu; Kyuna, Asanori; Owa, Tatsuhito; Noda, Yutaka

doi:10.1097/00129492-200211000-00024

Cited by 25 publications

(30 citation statements)

References 23 publications

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“…The high-intensity bone-conduction and air-conduction stimuli used in this study were less intense than those they used to elicit optimal VEMPs but may still have been sufficiently loud to elicit a response that could be mistaken for an ASSR. § It is also possible the response originates directly from the vestibular system (Nong et al, 2000). It was not possible to verify a vestibular contribution to the spurious ASSRs recorded in the present study; however, further support for this possibility is provided by subject 10, who reported vestibular effects when presented with high-intensity air-conduction directly to her left ear.…”

contrasting

confidence: 55%

Artifactual Responses When Recording Auditory Steady-State Responses

Small

Stapells

2004

Ear and Hearing

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Objective: The goal of this study was to investigate, in hearing-impaired participants who could not hear the stimuli, the possibility of artifactual auditory steady-state responses (ASSRs) when stimuli are presented at high intensities.Design: ASSRs to single (60 dB HL) and multiple (20 to 50 dB HL; 500 to 4000 Hz) bone-conduction stimuli as well as single 114 to 120 dB HL air-conduction stimuli, were obtained using the Rotman MASTER system, using analog-to-digital (A/D) conversion rates of 500, 1000, and 1250 Hz. Responses (p < 0.05) were considered artifactual when their numbers exceeded that expected by chance. In some conditions, we also obtained ASSRs to "alternated" stimuli (stimuli inverted and ASSRs to the two polarities averaged). A total of 17 subjects were tested. Conclusions: High-intensity air-or bone-conduction stimuli can produce spurious ASSRs, especially for 500 and 1000 Hz carrier frequencies. High-amplitude stimulus artifact can result in energy that is aliased to exactly the modulation frequency. Choice of signal conditioning (electroencephalogram filter slope and low-pass cutoff) and processing (A/D rate) can avoid spurious responses due to aliasing. However, artifactual responses due to other causes may still occur for bone-conduction stimuli 50 dB HL and higher (and possibly for high-level air conduction). Because the phases of these spurious responses do not invert with inversion of stimulus, the possibility of nonauditory physiologic responses cannot be ruled out. The clinical implications of these results are that artifactual responses may occur for any patient for bone-conduction stimuli at levels greater than 40 dB HL and for highintensity air-conduction stimuli used to assess patients with profound hearing loss. Results

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contrasting

confidence: 55%

Artifactual Responses When Recording Auditory Steady-State Responses

Small

Stapells

2004

Ear and Hearing

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“…Loud acoustic stimuli can excite the saccular vestibular epithelium (Nong et al, 2002;Todd et al, 2003;Miyamoto et al, 2007) and evoke a biphasic response in the ipsilateral pre-activated sternocleidomastoid (SCM) muscle (acoustic vestibular evoked cervical myogenic potentials VEMP or cVEMP) through descending vestibulo-spinal pathways. Loud click stimuli, short tone bursts and bone vibration of the mastoid at 500 Hz have been used throughout the literature.…”

Section: Introductionmentioning

confidence: 99%

Intermediate latency evoked potentials of cortical multimodal vestibular areas: Acoustic stimulation

Kammermeier¹,

Singh²,

Noachtar³

et al. 2015

Clinical Neurophysiology

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“…Los estudios clínicos y neurofisiológicos de los que se dispone indican que los VEMP se originan en las aferencias vestibulares del sáculo. Estas señales se transmiten a los núcleos vestibulares y, a través del haz vestibuloespinal, a los músculos ECM 13 . Los VEMP evocados por clics auditivos aparecen en pacientes con hipoacusia neurosensorial, pero no están presentes en sujetos con hipoacusia conductiva 14 .…”

Section: Artículos Originalesunclassified

Resultados de los potenciales evocados miogénicos vestibulares en el vértigo posicional paroxístico benigno

Boleas-Aguirre

Sánchez-Ferrándiz²,

Artieda

et al. 2007

Acta Otorrinolaringológica Española

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Objetivo: El vértigo posicional paroxístico benigno (VPPB) parece deberse a la migración de otoconias dentro de los conductos semicirculares o su adherencia a la cúpula. Si bien el origen de estas otoconias es la mácula del utrículo, aprovechando que los potenciales evocados miogénicos vestibulares (VEMP) valoran la función del sáculo, nuestro objetivo es estudiar su función en pacientes con VPPB. Pacientes y método: En 19 pacientes con VPPB por afección del conducto semicircular posterior, se valoró el nivel de audición, la respuesta de las pruebas calórica, rotatoria y VEMP. Se determinó en los VEMP ipsolaterales y contralaterales los umbrales, las latencias de las ondas p13 y n23 a 100 dB, la amplitud entre máximos y la diferencia de la amplitud interaural. Resultados: Se halló ausencia de respuesta de los VEMP en el 52 % de los oídos con VPPB. Cuando se corrigió por la ausencia de respuesta bilateral, los VEMP estaban ausentes en el 20,3 % de los casos. Conclusiones: En algunos pacientes con VPPB hay cierto grado de disfunción sacular.Palabras clave: VEMP. Vértigo posicional paroxístico benigno. Sáculo. Vestibular Evoked Myogenic Potentials and Benign Paroxysmal Positional VertigoObjective: Benign paroxysmal positional vertigo (BPPV) seems to occur because of otoconia migration into the semicircular canals or their adherence to the cupula. Although the origin of these otoconia lies in the macula of the utricle, vestibular evoked myogenic potentials (VEMPs) can be used assess saccular function. The aim of this study is to assess the saccular function in patients diagnosed with BPPV. Patients and method: Nineteen patients diagnosed with BPPV of the posterior semicircular canal were included in this study. Their auditory function and their caloric, rotatory chair, and VEMP responses were tested. Ipsilateral and contralateral VEMP thresholds, ipsilateral and contralateral p13 and n23 latencies at 100 dB, inter-peak amplitude and the interaural amplitude difference were determined. Results: We found a lack of VEMP response in 52 % of the ears with BPPV. When adjusted for bilateral absence, VEMP response was absent in 20.3 % of ears. Conclusions: Some patients with idiopathic BPPV show a degree of saccular dysfunction.Key words: VEMPs. Benign paroxysmal positional vertigo. Saccule. INTRODUCCIÓNEl vértigo posicional paroxístico benigno (VPPB) es una afección frecuente del oído interno y, de acuerdo con las hipótesis actuales, aparece como consecuencia de la migración de las otoconias en los conductos semicirculares o su adherencia a la cúpula de éstos. Las otoconias son depósi-tos cristalinos inorgánicos embebidos en la superficie de las membranas otolíticas del utrículo y el sáculo 1 . Cuando se desplazan de esta localización y flotan libremente en el interior de los conductos semicirculares o se adhieren a su cú-pula, estimulan los órganos terminales sensibles a los movimientos. Esto ocasiona vértigo y nistagmo cuando se adoptan las posiciones que desencadenan el cuadro. De todas maneras, no se ha identificado es...

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Saccular Origin of Acoustically Evoked Short Latency Negative Response

Abstract: It is clear that the presence of ASNR is dependent not on residual hearing but on normal saccular function. On the basis of these results, the authors believe ASNR to be saccular in origin.

Cited by 25 publications

References 23 publications

Artifactual Responses When Recording Auditory Steady-State Responses

Artifactual Responses When Recording Auditory Steady-State Responses

Intermediate latency evoked potentials of cortical multimodal vestibular areas: Acoustic stimulation

Resultados de los potenciales evocados miogénicos vestibulares en el vértigo posicional paroxístico benigno

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