Auditory fatigue: retrocochlear components

Details

• Personal Author:
  Hamernik D ; Salvi R
• Description:
  Measurements of auditory sensitivity were taken at the VIII nerve, cochlear nucleus, and inferior colliculus following a fatiguing sound exposure in chinchillas. Each animal was exposed to a standard temporary threshold shift (TTS) producing a tone of 8 minutes in duration at 95 decibels sound pressure level near the tympanic membrane. The exposure was at a frequency between 0.4 and 8.0 kilohertz. In the first experiment the auditory evoked response of the chinchillas was recorded from a chronic electrode placed over the rudimentary tentorium. In the second experiment the VIII nerve action potential and neurons from the cochlear nucleus were measured from anesthetized and tracheotomized chinchillas. In the third study the single units from the contralateral inferior colliculus were studied. The measurements indicated that low level, short duration sound exposures produced a progressively larger loss in sensitivity from peripheral to central auditory sites. These results suggested that there is a retrocochlear component to TTS. The authors conclude that different TTS exposures are likely to produce different physiological changes even though the final behavioral measurement of TTS is the same. [Description provided by NIOSH]
• Subjects:
  Hearing Hearing Loss, Noise-Induced Laboratories Noise Occupational Health Safety Sense Organs
• Keywords:
  Hearing-threshold Laboratory-animals NIOSH-Grant NIOSH-Publication Noise-exposure Noise-induced-hearing-loss Sensory-thresholds
• ISSN:
  0036-8075
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  New York ; OSHA Region 2
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  486-487
• Volume:
  190
• Issue:
  4213
• NIOSHTIC Number:
  nn:00190480
• Citation:
  Science 1975 Oct; 190(4213):486-487
• Contact Point Address:
  Otolaryngology Upstate Medical Center Departm 750 E Adams Street Syracuse, N Y 13210
• Federal Fiscal Year:
  1976
• NORA Priority Area:
  Disease and Injury: Hearing Loss
• Performing Organization:
  Upstate Medical Center, Syracuse, New York
• Peer Reviewed:
  True
• Start Date:
  19720501
• Source Full Name:
  Science
• End Date:
  19800630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:94b5eb95d930af08278590137e86a19ca1c076b5dcf6e7f235cc4dd5bd307e5d836bc6da4cdcb49f6b15cc5c2d8fac2d79d69984ee46d02d53f32083c09e3837
• Download URL:
  https://stacks.cdc.gov/view/cdc/204216/cdc_204216_DS1.pdf
• File Type:
  [PDF - 533.46 KB ]