Download or read book Measurement of Distortion Product Otoacoustic Emission Amplitudes Related to Aging and Middle Ear Resonant Frequency in Ears of Adults with Normal Hearing written by Fabiola A. Castro-Lauman and published by . This book was released on 2013 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Otoacoustic Emissions written by Martin S. Robinette and published by Thieme. This book was released on 2011-01-01 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new edition of a best-selling text with a CD-ROM by Dr. David Kemp The new edition of the best-selling Otoacoustic Emissions: Clinical Applications provides a thorough review of the complex physiology of the ear and clinical applications of the latest research on otoacoustic emissions. The book features new chapters on such important topics as middle ear function enhanced by reflectance measurements and the use of otoacoustic emissions as a preclinical measure of susceptibility to hearing loss. Accompanying the book is a CD-ROM developed by Dr. David Kemp, Ph.D., which contains animations, movies, and interviews. The CD-ROM serves as an indispensable aid to both teaching and reviewing key concepts. From physiological phenomena to diagnostic and clinical applications, this book is a complete reference on otoacoustic emissions that will provide graduates in audiology and residents in otolaryngology and otology with all the essential information needed for research and professional practice.
Download or read book Test retest Reliability of Distortion Product Otoacoustic Emissions in the High Frequency Range written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: (Uncorrected OCR) Abstract of dissertation entitled Test-retest Reliability of Distortion Product Otoacoustic Emissions in the High Frequency Range submitted by NG, Hoi-Yee Iris for the degree of Master of Science in Audiology at the University of Hong Kong in May 2002 In the current research study, distortion product otoacoustic emissions (DPOAEs) were measured in 35 young Chinese adults (61 ears) with normal audiometric thresholds using an IL096 OAE system with the default DP-gram protocols as well as user-defined DP spectrum protocols in the high frequency range. Two series of retest were conducted 20 minutes and an average of 15 days later, and the resolution setting for the DP-gram measurements was varied between 1 to 8 points per octave in each test series. Transient evoked otoacoustic emissions (TEOAEs) were also recorded in each test series for comparison purposes. Test-retest partial correlation and standard error of measurement (SEM) were computed to reflect the test-retest reliability of the OAE amplitudes, noise floor and signal-to-noise ratio. Results suggested that OAE amplitudes in the default frequency range (1 to 6 kHz) between test and retest were highly correlated with an average correlation coefficient of 0.85 and SEM was found to be an average of 2.4 dB, while signal-to-noise ratio and noise floor yielded lower correlation coefficients and higher SEMs. OAE amplitudes in the higher frequency range of 6.5 to 7 kHz were also significantly correlated between test and retest (correlation coefficient ranged from 0.74 to 0.80) with SEM from 2.7 to 3.5 dB. Yet DPOAEs at 8 kHz were present with a positive signal-to-noise ratio in only one-third of ears, were less test-retest correlated, and the amplitude revealed a high SEM of 5 dB. No apparent difference was demonstrated among various resolution settings and between short- and long- term retest. This implies that DPOAEs in the high frequency range (6.5 to 7 kHz) could be a potential clinical tool for mo.
Download or read book Hearing Loss written by National Research Council and published by National Academies Press. This book was released on 2004-12-17 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: Millions of Americans experience some degree of hearing loss. The Social Security Administration (SSA) operates programs that provide cash disability benefits to people with permanent impairments like hearing loss, if they can show that their impairments meet stringent SSA criteria and their earnings are below an SSA threshold. The National Research Council convened an expert committee at the request of the SSA to study the issues related to disability determination for people with hearing loss. This volume is the product of that study. Hearing Loss: Determining Eligibility for Social Security Benefits reviews current knowledge about hearing loss and its measurement and treatment, and provides an evaluation of the strengths and weaknesses of the current processes and criteria. It recommends changes to strengthen the disability determination process and ensure its reliability and fairness. The book addresses criteria for selection of pure tone and speech tests, guidelines for test administration, testing of hearing in noise, special issues related to testing children, and the difficulty of predicting work capacity from clinical hearing test results. It should be useful to audiologists, otolaryngologists, disability advocates, and others who are concerned with people who have hearing loss.
Download or read book Disorders of Peripheral and Central Auditory Processing written by Gastone G. Celesia and published by Elsevier Health Sciences. This book was released on 2013-12-12 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wideband Acoustic Immittance and DPOAE Changes in Older Adults written by and published by . This book was released on 2016 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examined the effect of middle ear aging in adults using wideband acoustic immittance (WAI) measures. WAI and traditional 226 Hz tympanometry were measured in 25 young adult ears (ages 18-25) and 26 older adult ears (ages 50-71) with normal middle ear status. While minimal differences between older and younger adults were observed with 226 Hz tympanometry, significant age effects were seen with WAI measures. The older adults demonstrated a statistically significant increase in middle ear absorbance at lower frequencies (226-1,260 Hz) and decreased absorbance at higher frequencies (4,000-5,040 Hz) compared to the younger adult group. While the effect of age on WAI was the primary focus of this study, other factors such as ear canal volume and sex influence WAI measures in addition to age. This study also examined the relationship between WAI and distortion product otoacoustic emissions at f2= 1,000, 2,000, and 4,000 Hz in 50 ears from both the age groups. A statistically significant relationship between WAI magnitude and DPOAE magnitude, independent of pure tone threshold sensitivity, was observed at 4,000 Hz. Findings from this study demonstrated an age effect in middle ear transfer function and a potential for WAI to assist with DPOAE interpretation. This study further contributes to the emerging research that suggests a conductive component to the aging auditory system.
Download or read book Effects of Age and Middle Ear Resonance on the Frequency Tuning of the CVEMP written by and published by . This book was released on 2020 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 at least 29 participants in each: young adult (20 - 39 years), middle age adult (40 - 59 years), and older adult (≥ 60 years). Screening measures included otoscopy, tympanometry, and case history rule out a conductive hearing loss or vestibular dysfunction. cVEMPs were elicited using air conduction tone-bursts stimuli at 500 Hz, 750 Hz, and 1000 Hz presented at a 125 dB pSPL. Electromyographic (EMG) target ranges were established to ensure consistent and adequate generation of tonic muscle activity and average EMG was recorded to normalize the cVEMP response amplitudes. Wideband acoustic immittance measures were performed on each subject to assess the resonance frequency of the middle ear. Results: No significant differences in mean middle ear resonant frequency were observed across age groups. The normalized cVEMP means and adjusted means with the middle ear resonant frequency as covariate were similar, however, all cVEMP analyses were performed on the adjusted means to control for individual differences of middle ear resonant frequency. There was a significant main effect of age group and cVEMP normalized response amplitude. Normalized cVEMP amplitudes for the younger adult and middle age adult groups to a 500 Hz and 750 Hz tone-burst stimuli were significantly larger compared to the older adult group. No significant differences in normalized cVEMP amplitude were observed at 1000 Hz across the three age groups. There was also a significant interaction of age group and stimulus frequency in the older adult group only. In the older adult group, the 1000 Hz tone-burst stimulus elicited the largest normalized cVEMP amplitude compared to both 500 Hz and 750 Hz, however, no significant differences in normalized amplitude between 500 Hz and 750 Hz were observed. Conclusions: The observed shift in frequency tuning of the cVEMP in normal, healthy, older adults suggests the best stimulus frequency to elicit a response may be higher than the 500 Hz tone burst stimulus utilized clinically. The frequency tuning of the cVEMP in older adults may be attributed to peripheral vestibular system degeneration or saccular changes in the aging adult population.
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1993 with total page 1488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of the Acoustical Society of America written by Acoustical Society of America and published by . This book was released on 2004 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Auditory Brain and Age Related Hearing Impairment written by Jos J. Eggermont and published by Academic Press. This book was released on 2019-01-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Auditory Brain and Age-Related Hearing Impairment provides an overview of the interaction between age-related hearing impairments and cognitive brain function. This monograph elucidates the techniques used in the connectome and other brain-network studies based on electrophysiological methods. Discussions of the manifestations of age-related hearing impairment, the causes of degradation of sound processing, compensatory changes in the human brain, and rehabilitation and intervention are included. There is currently a surge in content on aging and hearing loss, the benefits of hearing aids and implants, and the correlation between hearing loss, cognitive decline and early onset of dementia. Given the changing demographics, treatment of age-related hearing impairment need not just be bottom-up (i.e., by amplification and/or cochlear implantation), but also top-down by addressing the impact of the changing brain on communication. The role of age-related capacity for audio-visual integration and its role in assisting treatment have only recently been investigated, thus this area needs more attention.
Download or read book Index Medicus written by and published by . This book was released on 2002 with total page 2180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
Download or read book Transactions of the American Otological Society written by American Otological Society and published by . This book was released on 1993 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Functional Neurobiology of Aging written by Patrick R. Hof and published by Elsevier. This book was released on 2001-01-11 with total page 989 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some well-known age-related neurological diseases include Parkinson's disease, Alzheimer's disease, deafness, and blindness. Even more common are the problems of aging which are not due to disease but to more subtle impairments in neurobiological systems, including impairments in vision, memory loss, muscle weakening, and loss of reproductive functions, changes in body weight, and sleeplessness. As the average age of our society increases, diseases of aging continue to become more common, and conditions associated with aging need more attention by doctors and researchers. In 1991, patients over the age of 65 saw their doctors an average of eight times per year. Research funding is provided by the Neuroscience and Neuropsychology of Aging (NNA) Program, which is run by the National Institute on Aging. This book offers a comprehensive overview of all topics related to functional impairments which are related to the aging brain and nervous system. It is organized according to four general functions: movement, senses, memory, and neuroendocrine regulation. Written by the leading researchers in the field, this comprehensive work addresses both impairments associated with diseases and not associated with diseases, making it easier to understand the mechanisms involved. Functional Neurobiology of Aging is an important reference for professionals and students involved in aging research, as well as physicians who need to recognize and understand age-related impairments. - Organized by function, making it easy to find and understand the material - Addresses impairments both associated with diseases and not associated with diseases - Written by leading researchers in the field - Most comprehensive source of information on the neurobiology of aging
Download or read book Tuning Functions and Latencies of Distortion product Otoacoustic Emissions in Human Ears written by Zhiyi Zhou and published by . This book was released on 1998 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tinnitus An Interdisciplinary Approach Towards Individualized Treatment Towards Understanding the Complexity of Tinnitus written by and published by Elsevier. This book was released on 2021-04-25 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tinnitus - An Interdisciplinary Approach Towards Individualized Treatment: Towards Understanding the Complexity of Tinnitus, Volume 262, the latest release in the Progress in Brain Research series, highlights new advances in the field, with this new volume presenting interesting chapters on current topics such as Cochlear implantation for patients with tinnitus – a systematic review, Event Related Potentials to Assess the Tinnitus complaint during drug treatment, The difference in post-stimulus suppression between residual inhibition and forward masking, Sleep, sleep apnea and tinnitus, A Bayesian brain in imbalance: medial, lateral and descending pathways in tinnitus and pain, Tinnitus features according to caffeine consumption, and much more. - Provides the authority and expertise of leading contributors from an international board of authors - Presents the latest release in the Progress in Brain Research series - Includes the latest information on Tinnitus and its complexity
Download or read book Magnesium in the Central Nervous System written by Robert Vink and published by University of Adelaide Press. This book was released on 2011 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: The brain is the most complex organ in our body. Indeed, it is perhaps the most complex structure we have ever encountered in nature. Both structurally and functionally, there are many peculiarities that differentiate the brain from all other organs. The brain is our connection to the world around us and by governing nervous system and higher function, any disturbance induces severe neurological and psychiatric disorders that can have a devastating effect on quality of life. Our understanding of the physiology and biochemistry of the brain has improved dramatically in the last two decades. In particular, the critical role of cations, including magnesium, has become evident, even if incompletely understood at a mechanistic level. The exact role and regulation of magnesium, in particular, remains elusive, largely because intracellular levels are so difficult to routinely quantify. Nonetheless, the importance of magnesium to normal central nervous system activity is self-evident given the complicated homeostatic mechanisms that maintain the concentration of this cation within strict limits essential for normal physiology and metabolism. There is also considerable accumulating evidence to suggest alterations to some brain functions in both normal and pathological conditions may be linked to alterations in local magnesium concentration. This book, containing chapters written by some of the foremost experts in the field of magnesium research, brings together the latest in experimental and clinical magnesium research as it relates to the central nervous system. It offers a complete and updated view of magnesiums involvement in central nervous system function and in so doing, brings together two main pillars of contemporary neuroscience research, namely providing an explanation for the molecular mechanisms involved in brain function, and emphasizing the connections between the molecular changes and behavior. It is the untiring efforts of those magnesium researchers who have dedicated their lives to unraveling the mysteries of magnesiums role in biological systems that has inspired the collation of this volume of work.
Download or read book Physics Briefs written by and published by . This book was released on 1991 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
