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Role Of Emg Monitoring On Cvemp Testing In Preschool Age Children, Brenna Murray

Dissertations, 2020-current

While cervical vestibular evoked myogenic potential (cVEMP) testing has largely been studied and practiced on the adult population, less is known about the best practices for performing cVEMPs on a pediatric population, especially in young children under the age of 5 years. Further, very young children (i.e., 2-3 years) often prefer to sit with their caregiver during the testing, yet there is very little data on how much electromyographic (EMG) activity a child generates if in a seated position as opposed to a supine position. The purpose of this study was to assess the role of EMG on cVEMP recordings …

Amplitude-Modulated Cvemp (Amcvemps) Versus Transient Cvemp Response Properties: Possible Implications, Andrew Thorne

Dissertations, 2020-current

Cervical vestibular evoked myogenic potentials (cVEMPs) elicited by steady-state amplitude-modulated (AM) tones yield different information than conventional cVEMPs elicited by transient tonebursts, such as signal-to-noise ratio (SNR) and phase coherence (PC). This study systematically examined the effects of tonic EMG activation on AMcVEMP response properties versus conventional transient cVEMPs. Thirty five young, healthy adults (ages 19–23) with normal audiograms and no known vestibular lesions participated in this study. AMcVEMPs were elicited with bone-conducted tones with a carrier frequency of 500 Hz and an amplitude modulation frequency of 37 Hz, and transient cVEMPs were elicited by 4-0-4 Blackman-gated 500 Hz tonebursts …

Objective Detection Of Vestibular Evoked Myogenic Potentials, Daniel J. Romero

Dissertations, 2020-current

Cervical and ocular vestibular evoked myogenic potentials (cVEMPs and oVEMPs, respectfully) are considered objective tests of vestibular function measured using surface electromyography (EMG). In addition, VEMPs are visually detected by an examiner, often requiring a high level of stimulation to the ear to easily visualize a waveform plotted across time. However, a high level of stimulation, like those used during routine VEMP testing, is problematic since it has been shown to be unsafe in children when compared to adults. Visual interpretation can also vary between examiners in cases of reduced vestibular function or when the level of required muscle contraction …

Effects Of Age And Middle Ear Resonance On The Frequency Tuning Of The Cvemp, Paris M. Atabek

Dissertations, 2020-current

Objective: The purpose of this study was to assess age-related changes in the frequency tuning of the cervical vestibular evoked myogenic potential (cVEMP) and determine the optimal air conduction tone-burst stimulus frequency to elicit a cVEMP in the young, middle age, and older adult populations. Additionally, we performed wideband acoustic immittance measures to better delineate whether observed changes in frequency tuning properties of the cVEMP across the lifespan emanate from changes in the middle ear transfer function or from the otolith end organs.

Design: A cross-sectional study design included 98 healthy participants divided into 3 age groups of …