Evoked Response ‘Forward Masking’ Patterns in Chinchillas with Temporary Hearing Loss

Details

• Personal Author:
  Arehole S ; Henderson D ; Salvi RJ ; Saunders SS
• Description:
  Evoked response "forward masking" data were measured from the inferior colliculus of the chinchilla before and during a temporary threshold shift. The hearing loss was induced by a 2 kHz pure tone of 85 dB SPL presented from 5-8 days. The exposure elevated thresholds by approximately 35 dB at the mid frequencies, but had no effect on low frequency hearing. The exposure also altered the time course of the evoked response forward masking data. Time constants fitting the forward masking data increased by up to a factor of three at the frequency with the greatest loss, but remained within normal limits at the low frequencies where hearing was normal. The increase in the forward masking time constants became most noticeable once the hearing loss exceeded 25 dB. These physiological results are consistent with psychophysical forward masking data from hearing impaired listeners. [Description provided by NIOSH]
• Subjects:
  Animals Hearing Hearing Loss Hearing Loss, Noise-Induced Noise Noise, Occupational Occupational Health Safety
• Keywords:
  Animal Studies Author Keywords: Forward Masking Evoked Response Hearing Impairment Hearing Loss Hearing Tests Hearing Threshold Inferior Colliculus Noise Frequencies Noise Induced Hearing Loss Temporal Resolution Temporary Threshold Shift

  More +
• ISSN:
  0378-5955
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 6 ; Texas
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  193-205
• Volume:
  27
• Issue:
  3
• NIOSHTIC Number:
  nn:20060255
• Citation:
  Hear Res 1987 Jan; 27(3):193-205
• Contact Point Address:
  R.J. Salvi, Callier Center for Communication Disorders, University of Texas at Dallas, 1966 Inwood Road, Dallas, TX 75235, U.S.A.
• Federal Fiscal Year:
  1987
• Performing Organization:
  University of Texas Dallas, Richardson, Texas
• Peer Reviewed:
  True
• Start Date:
  19800701
• Source Full Name:
  Hearing Research
• End Date:
  19970331
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:07a53807479ad0b198fe2f28d8a619e92c14436a668952b88f8a786923e43824cc2820a68c9f0ca9fca6be6c5f6bdcbde51679dc3c49b1b8dfbaa3e5481c65dd
• Download URL:
  https://stacks.cdc.gov/view/cdc/224213/cdc_224213_DS1.pdf
• File Type:
  [PDF - 676.24 KB ]