Characteristics of auditory brainstem responses in ground squirrels |
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Authors: | N J Hamill M D McGinn J M Horowitz |
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Institution: | (1) Departments of Animal Physiology and Otolaryngology, University of California, 95616 Davis, California, USA |
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Abstract: | Summary Auditory brainstem responses (ABRs) were characterized at 37 °C in ground squirrels (Citellus lateralis) which were implanted with recording screws to record ABRs, and a thermistor to record brain temperature. After two weeks ground squirrels were reanesthetized and tone pips and clicks were delivered through a TDH-49 headphone.Recorded ABRs were found to vary in a predictable manner as a function of stimulus frequency and intensity. At intensities above 50 dB SPL, ABRs could be recorded over the range tested (2–32 kHz). An 8 kHz tone pip was the best frequency for recording ABRs at the lowest stimulus intensities. Latencies decreased as stimulus frequencies increased from 4 kHz to 32 kHz. |
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Keywords: | Auditory brainstem responses Citellus lateralis Auditory thresholds |
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