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The Journal of Neuroscience, July 30, 2003, 23(17):6928-6935

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Long Memory in Song Learning by Zebra Finches

Yasuko Funabiki and Masakazu Konishi

Division of Biology, California Institute of Technology, Pasadena, California 91125

Young songbirds use memorized tutor songs as templates to shape their own songs. This process requires control of voice by auditory feedback. We prevented zebra finches from hearing their own vocalizations by exposure to loud noise after 35 d of age, before which they had been reared with song tutors from birth. When the noise stopped at 102-200 d of age, the birds sang unstable and noisy song syllables that did not resemble the tutor syllables. The similarity to the tutor syllables steadily increased until the time of song crystallization 30 d later. These findings show that the memory of tutor syllables survives auditory perturbations during the period when it is normally recalled and that zebra finches can use the memory well after the normal period of song development. The temporal order of syllables resembled the tutor model only in birds released from the noise before 80 d of age but not in older birds. Thus, different schedules and processes may govern the learning of syllable phonology and syntax.

Key words: zebra finch; memory; learning; auditory feedback; sensory phase; sensorimotor phase

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Received Feb. 6, 2003; revised Jun. 4, 2003; accepted Jun. 4, 2003.

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