| Autor: |
Wiederhold, M. L. |
| Zdroj: |
Journal of the Acoustical Society of America; 1970, Vol. 48 Issue 4B, p966-977, 12p |
| Abstrakt: |
Spike discharges were recorded from single auditory-nerve fibers in anesthetized cats. Counts were made of the number of discharges in response to tone bursts at several sound levels presented both alone and preceded by a train of shocks delivered to the decussation of the crossed olivocochlear bundle (COCB). From these counts, a measure <Δu> of the COCB effect was computed for 141 fibers. <Δu> is maximum when measured with tone bursts at a fiber's characteristic frequency and decreases for tones of higher or lower frequency. <Δu> was found to be unrelated to the fibers' spontaneous discharge rates. <Δu> increases with increasing characteristic frequency up to 6-10 kHz and decreases above 15 kHz. For most fibers, <Δu) does not correlate with fiber threshold. Those fibers whose apparent threshold is more than 25 dB above the minimum threshold at their characteristic frequency have low <Δu>'s. These results are discussed in relation to previous gross-electrode studies and the anatomical distribution of efferent endings in the cochlea. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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