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Local auditory evoked potentials and effects of pure tones on click evoked potentials in the pigeon



Local auditory evoked potentials and effects of pure tones on click evoked potentials in the pigeon



Hearing Research 17(1): 13-26



Local auditory evoked potentials (AEP) in the pigeon were recorded from the nucleus magnocellularis (NM), nucleus angularis (NA) and Field L with tungsten microelectrodes. In the NM and NA, AEPs in response to clicks were always suppressed by application of continuous pure tones at specific frequencies as is usual for simultaneous masking. In the NA, frequencies of continuous pure tones which produced maximum suppression and frequencies of tone bursts which elicited maximum response both centered around 0.8 kHz. The NM tended to respond similarly. In Field L, however, amplitudes of the AEPs to clicks were suppressed, enhanced, both suppressed and enhanced or unaffected by presentation of continuous pure tones at specific frequencies. The frequencies of tone bursts which caused maximum AEP were vaguely related to the frequencies of continuous pure tones which elicited maximum suppression of the AEPs to clicks. Enhancement was produced by 1-2 kHz continuous pure tones independent of the frequency of tone bursts that produced maximum AEP. Enhancement, suppression and lack of effect in Field L were due to some central neural mechanism.

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Accession: 005821116

Download citation: RISBibTeXText

PMID: 3997677

DOI: 10.1016/0378-5955(85)90125-x


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