Abstract
AbstractAveraged evoked auditory responses from chronically implanted dural electrodes over the midectosylvian gyrus were evaluated in eight cats. The effects of the distribution of electrodes and levels of alertness were observed for each animal and the entire group. Changes in duration, rise and decay times, and repetition rates were also analyzed. Data from these experiments suggested a large variability in the amplitude and latency of the response. On the other hand, they also suggested a stable reproducible threshold of detectability — a point where the response disappeared upon further reduction in sound pressure levels. This characteristic of the evoked system served as a reliable measurement of an evoked auditory threshold and appeared as a potential means for evaluating relative changes of auditory function within the same animal.
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