Vergence increases the amplitude of lateral ocular vestibular evoked myogenic potentials

The angular and linear vestibulo-ocular reflex responses are greater when viewing near targets to compensate for the relatively larger translation of the eyes with respect to the target. Our aim was to measure vestibular evoked myogenic potentials using a lateral ocular electrode montage (oVEMP) wit...

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Bibliographic Details
Published in:Experimental brain research 2021-04, Vol.239 (4), p.1337-1344
Main Authors: Tamás, László T., Migliaccio, Americo A., Todd, Christopher J., Schubert, Michael C., Büki, Béla
Format: Article
Language:English
Subjects:
Animal behavior
Auditory evoked potentials
Biomedical and Life Sciences
Biomedicine
Brain research
Electrodes
Evoked potentials (Electrophysiology)
Eye
Laboratories
Movements
Neurological research
Neurology
Neurosciences
Otolaryngology
Physiological aspects
Research Article
Semicircular canals
Velocity
Vestibular system
Vestibulo-ocular reflex
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Summary:The angular and linear vestibulo-ocular reflex responses are greater when viewing near targets to compensate for the relatively larger translation of the eyes with respect to the target. Our aim was to measure vestibular evoked myogenic potentials using a lateral ocular electrode montage (oVEMP) with a laterally applied stimulus using a mini-shaker during both far- and near-viewing (vergence) distances to determine whether vergence affects the oVEMP response as it does the semicircular canal vestibulo-ocular reflex response. Our results show that during vergence, the p1 and n1-p1 amplitude of the lateral oVEMP response increases significantly, whereas the latencies do not change significantly. We suggest that the physiological basis for this vergence-mediated amplitude increase in potentials may be the same as those already documented using transient linear head accelerations. Our data also suggest that irregular vestibular afferents are likely mediating the vergence-mediated gain increase during linear head accelerations because only irregular afferents are stimulated during short, transient 500 Hz stimuli.
ISSN:0014-4819
1432-1106
DOI:10.1007/s00221-021-06056-1