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Age-Related Decline In Neural Synchrony And The Ffr, Haley Szabo
Age-Related Decline In Neural Synchrony And The Ffr, Haley Szabo
Dissertations, 2020-current
It is a known phenomenon that speech understanding in background noise declines with advancing age. Although there is ample evidence of behavioral measures declining with age, there is less physiologic evidence. This study hypothesizes that the FFR will be degraded with advancing age, consistent with poorer phase locking. This is hypothesized to be present even in people with audiograms within normal limits. A second hypothesis is that middle-aged adults will have degraded neural representation as frequency increases, compared to a younger normal hearing group which will have better high frequency neural representation than the middle-aged group. Subjects were divided into …
A Survey Of Cochlear Implant Clinical Protocols In India, Ariana Morris
A Survey Of Cochlear Implant Clinical Protocols In India, Ariana Morris
Dissertations, 2020-current
The most recent data published in December 2019 records that approximately 736,900 registered cochlear implantation devices have been received since their approval in the 1980s. While 183,100 of these devices belong to U.S. Citizens, the large majority of cochlear implant recipients live in other countries (U.S. Department of Health and Human Services, 2016). While a lack of standardized practices exists in relation to audiologic care and management of cochlear implant devices and patients, Browning et al. (2020) attempts to assess and analyze common practices amongst audiologists practicing within the United States of America. This survey uses a modified questionnaire based …
The Relationship Between The Vestibular Ocular Reflex And Perception In Young Healthy Adults, Susanne Nelson
The Relationship Between The Vestibular Ocular Reflex And Perception In Young Healthy Adults, Susanne Nelson
Dissertations, 2020-current
Vestibular impairments are often identified through measures of vestibular reflexes such as the vestibulo-ocular reflex (VOR). However, in clinical practice measures of the VOR do not always correlate with the patient’s reported symptoms. In contrast to physiologic measures like the VOR, psychophysical methods can be used to assess a person’s perception of movement. Previous psychophysics research shows that perceptual thresholds of angular motion do not correlate with VOR measures, but this has not been assessed at suprathreshold levels. The purpose of this study was to assess whether vestibular reflexive responses (i.e., VOR) were correlated to the patient’s perception of movement …
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 …
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 …