Eighth nerve fiber firing features in normal-hearing XXXX .

@entity2198 @entity6888 @entity95 @entity389
Neural activity of single eighth nerve fibers was recorded with glass microelectrodes in anesthetized normal-hearing @entity95 . The units had a spontaneous rate ranging from 0 to approximately 120 spikes/s. In a large number of fibers this rate was below 2 spikes/s. The frequency tuning curves (FTCs) had a tip and a tail region for fibers with a high or medium @entity2198 ( @entity2198 ). For low-frequency units the @entity6888 was more symmetrically U-shaped. The tip threshold reached the behavioral threshold and units with thresholds of up to more than 60 dB above the mean behavioral threshold were found. There was a weak negative correlation between spontaneous rate and tip threshold. Frequency selectivity, Q10, was about 2 for units with @entity2198 below 2 kHz and about 5 for those with @entity2198 above 4 kHz. The peristimulus time (PST) histogram showed an initial peak, a plateau, and poststimulus inhibition. For the majority of fibers the dynamic range was 20-30 dB. Some fibers did not reach saturation within the stimulus intensity available. The tip-to-tail distance was 50 dB for high-frequency units at one octave below @entity2198 , a matter of potential interest for further studies of animals with @entity389 .
