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Response of auditory system of bats to ultrasonic stimuli

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Conclusions

Combined electrical responses in the inferior colliculus to short ultrasounds, and responses of single neurons of the inferior colliculus were recorded in the bat,Myotis oxygnathus. The amplitude of the combined electrical response, reflecting the number of excited neurons, is proportional to the intensity of ultrasound within the range from 0 to 100 db. The frequency-threshold curve for this response is Ushaped. The thresholds are relatively low in the zone 10–80 kHz, with a principal minimum at 20–30 kHz, and an additional minimum at 70 kHz. A second, very strong stimulus evokes a minimal electrical response after only 1 msec, and a response of normal amplitude 4 msec after the first stimulus. Singular collicular neurons have different frequency-threshold curves: “wide,” “narrow,” and also partly or completely truncated by inhibition arising in the course of supramaximal stimulation.

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Authors and Affiliations

  1. Department of Physiology of Higher Nervous Activity, Zhdanov University, Leningrad

    A. G. Vasil'ev & D. P. Matyushkin

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  1. A. G. Vasil'ev
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  2. D. P. Matyushkin
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Vasil'ev, A.G., Matyushkin, D.P. Response of auditory system of bats to ultrasonic stimuli. Neurosci Behav Physiol 1, 435–441 (1967). https://doi.org/10.1007/BF01126537

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