We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Auditory efferent activation in CBA mice exceeds that of C57s for varying levels of noise.
- Authors
Frisina, Robert D; Newman, S R; Zhu, Xiaoxia
- Abstract
The medial olivocochlear efferent (MOC) system enhances signals in noise and helps mediate auditory attention. Contralateral suppression (CS) of distortion product otoacoustic emissions (DPOAEs) has revealed age-related MOC declines. Here, differences in CS as a function of contralateral noise intensity (43-67 dB sound pressure level) were measured; 2f1-f2 DPOAE grams were recorded for young adult CBA and C57 mice. In CBAs, CS was a monotonic function of contralateral noise level. The C57s showed normal hearing, measured with DPOAE amplitudes and auditory brainstem response thresholds, but showed little CS, suggesting a loss of efferent dynamics preceding any deficiencies of the afferent auditory system.
- Publication
The Journal of the Acoustical Society of America, 2007, Vol 121, Issue 1, pEL29
- ISSN
0001-4966
- Publication type
Research
- DOI
10.1121/1.2401226