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Full-Text Articles in Speech and Hearing Science
Temporal Modulation Transfer Functions Of Amplitude-Modulated Cervical Vestibular Evoked Myogenic Potentials In Young Adults, Kerri Lawlor
Temporal Modulation Transfer Functions Of Amplitude-Modulated Cervical Vestibular Evoked Myogenic Potentials In Young Adults, Kerri Lawlor
Dissertations, 2020-current
Cervical vestibular evoked myogenic potentials (cVEMPs) are widely used to evaluate saccular function in clinical and research applications. Typically, transient tonebursts are used to elicit cVEMPs. In this study, we used bone-conducted amplitude-modulated (AM) tones to elicit AMcVEMPs. This new approach allows the examination of phase-locked vestibular responses across a range of modulation frequencies. Currently, cVEMP temporal modulation transfer functions (TMTFs) are not well defined. The purposes of the present study were 1) to characterize the AMcVEMP TMTF in young, healthy individuals, 2) to compare AMcVEMP TMTFs across different analysis approaches, and 3) to determine the upper frequency limit of …
Effect Of Sound Source Location And Spatial Hearing On The Vestibulo-Ocular Reflex (Vor), Mary Easterday
Effect Of Sound Source Location And Spatial Hearing On The Vestibulo-Ocular Reflex (Vor), Mary Easterday
Theses and Dissertations (ETD)
Accurate measurement of the vestibulo-ocular reflex (VOR) is imperative in differential diagnosis of vestibular disorders and balance function. However, the assessment protocol faces a number of limitations, including the need to control for extra- vestibular sensory factors such as hearing. Previous research has shown that the use of an auditory stimulus can have a significant effect on functional measures of balance, and many have contributed effects to be the result of spatial hearing. However, no studies have directly assessed the effect of speaker location on the VOR nor investigated correlations of functional spatial hearing with the VOR. Therefore, the aims …
Induction Of Nocebo Effects By Verbal Suggestions During The Caloric Test, Abbey Weist
Induction Of Nocebo Effects By Verbal Suggestions During The Caloric Test, Abbey Weist
Dissertations, 2020-current
The caloric test is the most frequently performed vestibular diagnostic test and is considered the “gold-standard” for the assessment of the peripheral vestibular system. Using a warm or cool stimulus, the caloric test alters the temperature gradient in the vestibular system resulting in nausea and dizziness. The nocebo effect is a phenomenon that can occur when negative expectations result in negative effects. No study has examined whether expectations of nausea and dizziness during the caloric test enhance the experience of unwanted symptoms. The purpose of this investigation was to determine whether a nocebo response can be elicited during the caloric …
Vestibular Evoked Myogenic Potentials And Postural Control In Adults With Age-Related Hearing Loss, Steven Michael Doettl
Vestibular Evoked Myogenic Potentials And Postural Control In Adults With Age-Related Hearing Loss, Steven Michael Doettl
Theses and Dissertations (ETD)
It is well-documented that auditory thresholds decrease with age, which can be referred to as Age-related hearing loss (ARHL). ARHL is one of the most common conditions affecting older adults and is associated with several conditions including decreased postural stability and falls. Age-related changes to auditory function have been attributed to, through histopathological study, specific degradation of the sensory, supporting, and afferent structures of the cochlea. Vestibular function, as measured through vestibular evoked myogenic potentials (VEMPs) also show decreases with age. VEMPs are a measurement of evoked potentials generated by auditory stimulation of the utricle and saccule measured through a …
Inner Ear Disorders Associated With Hearing And Vestibular Loss: A Case Series, Kelly Retzlaff
Inner Ear Disorders Associated With Hearing And Vestibular Loss: A Case Series, Kelly Retzlaff
AuD Capstone Projects - Communication Sciences and Disorders
Introduction: Sudden sensorineural hearing loss (SSNHL), a hearing loss of at least 30 dB at three or more consecutive frequencies within a 72-hour period, is typically idiopathic. Potential causes are thought to include viral, autoimmune, vascular, neurologic, neoplastic, or traumatic origins. Treatment consists of steroids. Poor patient follow up and compliance with rehabilitation negatively affect outcomes. Poor follow-up also results in the inadequate medical documentation of outcomes. Case Presentation: a 20-year old female presented with unilateral SSNHL with high-frequency tinnitus in the right ear. Her audiological history includes a known profound hearing loss in the left ear, as well as, …
The Feasibility Of Standardized Cognitive Assessments For Vestibular Patients, Brynn Morales
The Feasibility Of Standardized Cognitive Assessments For Vestibular Patients, Brynn Morales
Senior Honors Projects, 2010-2019
Vestibular dysfunction, or impairments in the inner ear and/or brain structures that process sensory information and help control balance, has a high correlation with cognitive deficits, or problems with mental processes. This relationship negatively affects daily activities and quality of life in persons that live with vestibular dysfunction. Though there is sufficient research proving the relationship, few studies have applied that information in ways to better help the population with vestibular dysfunction. The purpose of this study was to assess the feasibility of a cognitive assessment battery (a set of correlated assessments delivered in one session) tailored to measuring performance …
Cervical Vestibular-Evoked Myogenic Potentials (Cvemps): "Differentiation Of Inter-Neck Emg Symmetry Between Children And Adults", Ellen Jones
Senior Honors Projects, 2010-2019
A cervical Vestibular-Evoked Myogenic Potential (cVEMP) is one of the few objective vestibular diagnostic tests available for pediatric populations. This test evaluates the functionality of the saccule end organ through an inhibitory reflex on the sternocleidomastoid (SCM) muscle that inhibits the level of electromyographic (EMG) activity (Wiener-Vacher, 2013). Because the saccule response is measured as an inhibition of EMG in the SCM, it is imperative that the SCM have a tonic contraction prior to eliciting the response and that the contraction of the SCM is equal on the right and left sides. It is generally accepted that young, healthy adults …
Does Emg Monitoring In A Cvemp Matter?, Kimberly Fleck
Does Emg Monitoring In A Cvemp Matter?, Kimberly Fleck
Senior Honors Projects, 2010-2019
To determine if EMG monitoring or the use of amplitude normalization would significantly reduce the amplitude variability and amplitude asymmetry of the cVEMP in children ages 3 and under, we first needed to create a control group with young, healthy adults to compare the pediatric group to. We also wanted to replicate earlier studies that showed EMG monitoring and amplitude normalization does not have an impact on the VEMP in young, healthy adults. We tested two different positions, sitting and supine. Supine is the optimal position to generate EMG, but we wanted to have control data in case the pediatric …
Differential Effects Of Cdh23753a On Auditory And Vestibular Functional Aging In C57bl/6j Mice, Bruce E. Mock, Sarath Vijayakumar, Jessica Pierce, Timothy A. Jones, Sherri M. Jones
Differential Effects Of Cdh23753a On Auditory And Vestibular Functional Aging In C57bl/6j Mice, Bruce E. Mock, Sarath Vijayakumar, Jessica Pierce, Timothy A. Jones, Sherri M. Jones
Department of Special Education and Communication Disorders: Faculty Publications
The C57BL/6J (B6) mouse strain carries a cadherin 23 mutation (Cdh23753A, also known as Ahl), which affects inner ear structures and results in age-related hearing loss. The B6.CAST strain harbors the wild type Cdh23 gene, and hence, the influence of Ahl is absent. The purpose of the present study was to characterize the effect of age and gender on gravity receptor function in B6 and B6.CAST strains and to compare functional aging between auditory and vestibular modalities. Auditory sensitivity declined at significantly faster rates than gravity receptor sensitivity for both strains. Indeed, vestibular functional aging was …