Abstract

Experiments are proposed to investigate some of the physiological changes that take place in the peripheral auditory system as the result of aging in a quiet environment and aging in an environment of low-level noise. Our major goal is to identify some of the mechanisms in the cochlea that deteriorate with age and chronic noise exposure. Preliminary results suggest that dysfunction in the ion-pumping tissue along the cochlear duct may be responsible for certain types of hearing loss seen with age. Studies are also proposed to examine some effects of age and noise on the second-order neurons in the cochlear nucleus. The purpose of the cochlear nucleus studies is to begin to examine how the central nervous system responds to long-term low-level exposures of noise. The proposed work has direct bearing on human studies concerned with the gradual loss of hearing often found in the elderly, a process termed presbyacusis. Systematic studies in animals under controlled conditions will provide an opportunity to test various hypotheses of how age and environment interact to change the peripheral auditory system.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Specialized Center (P50)
Project #
5P50DC000422-04
Application #
3875116
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
4
Fiscal Year
1990
Total Cost
Indirect Cost

  Institution

Name
Medical University of South Carolina
Department
Type
DUNS #
183710748
City
Charleston
State
SC
Country
United States
Zip Code
29425

  Publications

Lewis, Morag A; Nolan, Lisa S; Cadge, Barbara A et al. (2018) Whole exome sequencing in adult-onset hearing loss reveals a high load of predicted pathogenic variants in known deafness-associated genes and identifies new candidate genes. BMC Med Genomics 11:77
Bologna, William J; Vaden Jr, Kenneth I; Ahlstrom, Jayne B et al. (2018) Age effects on perceptual organization of speech: Contributions of glimpsing, phonemic restoration, and speech segregation. J Acoust Soc Am 144:267
Panganiban, Clarisse H; Barth, Jeremy L; Darbelli, Lama et al. (2018) Noise-induced dysregulation of Quaking RNA binding proteins contributes to auditory nerve demyelination and hearing loss. J Neurosci :
Chiarello, Christine; Vaden Jr, Kenneth I; Eckert, Mark A (2018) Orthographic influence on spoken word identification: Behavioral and fMRI evidence. Neuropsychologia 111:103-111
Harris, Kelly C; Vaden Jr, Kenneth I; McClaskey, Carolyn M et al. (2018) Complementary metrics of human auditory nerve function derived from compound action potentials. J Neurophysiol 119:1019-1028
McRackan, Theodore R; Fabie, Joshua E; Burton, Jane A et al. (2018) Earphone and Aided Word Recognition Differences in Cochlear Implant Candidates. Otol Neurotol 39:e543-e549
Dubno, Judy R (2018) Beyond the audiogram: application of models of auditory fitness for duty to assess communication in the real world. Int J Audiol 57:321-322
McRackan, Theodore R; Clinkscales, William B; Ahlstrom, Jayne B et al. (2018) Factors associated with benefit of active middle ear implants compared to conventional hearing aids. Laryngoscope 128:2133-2138
Dias, James W; McClaskey, Carolyn M; Harris, Kelly C (2018) Time-Compressed Speech Identification Is Predicted by Auditory Neural Processing, Perceptuomotor Speed, and Executive Functioning in Younger and Older Listeners. J Assoc Res Otolaryngol :
Worley, Mitchell L; Schlosser, Rodney J; Soler, Zachary M et al. (2018) Age-related differences in olfactory cleft volume in adults: A computational volumetric study. Laryngoscope :

Showing the most recent 10 out of 135 publications