Effects of the stimulus phase on the air-conducted ocular vestibular evoked myogenic potential in healthy subjects

Amorim, Fernanda Emanuelle Almeida Castro; Sahdo, Alinne Martiniano; Giuliano, Lydia Maria Pereira; Pinheiro, Denise Spinola; Braga, Nadia Iandoli de Oliveira; Manzano, Gilberto Mastrocola

doi:10.1016/j.clinph.2016.10.001

Cited by 2 publications

(5 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Results indicated amplitude values differed depending on which subpeak was examined. When focusing on only the most prominent subpeak, there was no significant difference between the three polarities; however, if comparing only the first main subpeak, the amplitudes were significantly larger for condensation (Amorim et al 2017).…”

Section: Vemp Stimulus Parametersmentioning

confidence: 79%

“…The first study by Govender et al (2016b), which was a reanalysis of the study by Lim et al (2013), found that rarefaction and condensation showed no difference in amplitude. The second, a study by Amorim et al (2017), focused on phase differences with measurements of amplitude and presence of subpeaks in 12 healthy adults with a similar montage to that by Govender et al (2016b). All significant findings in Amorim et al (2017) were dependent on which subpeak was measured, the first or the most prominent peak.…”

Section: Discussionmentioning

confidence: 99%

“…The second, a study by Amorim et al (2017), focused on phase differences with measurements of amplitude and presence of subpeaks in 12 healthy adults with a similar montage to that by Govender et al (2016b). All significant findings in Amorim et al (2017) were dependent on which subpeak was measured, the first or the most prominent peak. Consequently, no amplitude differences were found with the most prominent peaks; however, the first main subpeak showed significantly larger amplitude for condensation than the other polarities.…”

Section: Discussionmentioning

confidence: 99%

“…The explanation of the latency difference found between condensation and rarefaction is supported by the anatomical arrangement of the stereocilia on either side of the striola, which activate hyperpolarization and depolarization simultaneously in the otoliths (McCue and Guinan, 1994;Leigh and Zee, 2006;Amorim et al, 2017). The medial portion of the macula in the utricle is activated by gravitational forces causing a pull action, and the lateral portion responds best to translational effects (push).…”

Section: Discussionmentioning

confidence: 99%

“…In all aforementioned studies, no attempt was made to look specifically at the influence of polarity, coupled with the belly-tendon electrode montage, on the overall response amplitude. One recent study by Amorim et al (2017) focused on the effects of polarity, but the authors used an electrode montage that resembled Govender et al (2016b) and not Sandhu et al (2013). Amorim and colleagues tested 12 healthy individuals using rarefaction, condensation, and alternating polarities.…”

Section: Vemp Stimulus Parametersmentioning

confidence: 99%

See 4 more Smart Citations

Impact of Stimulus Polarity on oVEMP Response Using the Belly-Tendon Electrode Montage

et al. 2019

View full text Add to dashboard Cite

One stimulus parameter not well established with respect to the ocular vestibular evoked myogenic potential (oVEMP) is stimulus polarity. Many research studies traditionally record oVEMPs using alternating polarity primarily.The purpose of this study was to evaluate the effects of stimulus polarity on the oVEMP response under three different conditions (condensation, rarefaction, and alternating) with updated but established recording procedures—the belly-tendon electrode montage.oVEMPs were assessed with changes in stimulus polarity in the seated upright position.Thirty otologically normal participants (60 ears) with no history of hearing or balance disorders and normal middle ear function.Five hundred–hertz air-conducted tone bursts at 95-dB nHL were used to evoke the oVEMP response while recordings were made from the contralateral eye to acoustical stimulation using the belly-tendon electrode montage. Measurements were made using three polarities: alternating, condensation, and rarefaction. Natus Bio-logic AEP hardware and software was used for all data collection and analysis.Condensation stimulus phase provided the largest response amplitude compared with alternating and/or rarefaction. Rarefaction provided the earliest latency among stimulus polarities.Condensation is a more effective stimulus polarity regarding response amplitude when recording the oVEMP. This study further supports the use of the belly-tendon electrode montage for recording the oVEMP response.

show abstract

Section: Vemp Stimulus Parametersmentioning

confidence: 79%