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Responses of neurons of bat cochlear nuclei to simultaneously presented ultrasonic stimuli



Responses of neurons of bat cochlear nuclei to simultaneously presented ultrasonic stimuli



Neirofiziologiya 10(3): 252-260



The single unit activity of cochlear nuclei in Vespertilionidae Myotis oxygnathus were studied by means of ultrasonic pure tonal and frequency-modulated stimuli. Most neurons (85%) had tonic reaction to combination tones f2-f1 and 2f1-f2 (f1, pulse frequency of the 1st tone, f2 pulse frequency of the 2nd tone) as a result of the nonlinearity in the auditory system. The reaction to the combination tones depended upon pulse frequency and sound pressure level of each of the presented stimuli. Tonic reaction appeared in the case when the combination tone was equal to the best frequency of the neuron. The question about the role of the nonlinearity of the auditory system in the resolution of the complex signals was discussed.

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Accession: 006328971

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