Development of auditory sensitivity of altricial birds: absolute thresholds of the generation of evoked potentials

The thresholds of the generation of EP in the L field of two to nine day old pied flycatcher nestlings in response to monotonal bursts of varied frequency were investigated. The entire range of auditory sensitivity was divided into three channels on the basis of the character of the age-related dyna...

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Bibliographic Details
Published in:Neuroscience and behavioral physiology 1992-03, Vol.22 (2), p.132-137
Main Authors: Aleksandrov, L I, Dmitrieva, L P
Format: Article
Language:English
Subjects:
Aging - physiology
Animals
Auditory Threshold - physiology
Birds - growth & development
Evoked Potentials, Auditory - physiology
Male
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Summary:The thresholds of the generation of EP in the L field of two to nine day old pied flycatcher nestlings in response to monotonal bursts of varied frequency were investigated. The entire range of auditory sensitivity was divided into three channels on the basis of the character of the age-related dynamics of the thresholds (two to nine days of life): low-frequency (0.3-1.6 kHz), middle- (1.5-4.0 kHz), and high-frequency (5.0-8.0 kHz). Widening of the auditory range in the direction of high frequencies on the 4th to 5th days of nest life was demonstrated. It was shown that the development of auditory sensitivity continues in all three channels in the post-embryonic period (two to nine days after hatching), and that each of these is characterized by its own thresholds time course.
ISSN:0097-0549
1573-899X
DOI:10.1007/BF01192385