A memory-driven auditory program ensures selective and precise vocal imitation in zebra finches

Wan-Chun Liu,Mia Inserra,Michelle Landstrom,Gillian Schutt,Francesca Fernandez

doi:10.1038/s42003-021-02601-4

Abstract

In the vocal learning model, the juvenile first memorizes a model sound, and the imprinted memory gradually converts into vocal-motor output during the sensorimotor integration. However, early acquired memory may not precisely represent the fine structures of a model sound. How do juveniles ensure precise model imitation? Here we show that juvenile songbirds develop an auditory learning program by actively and attentively engaging with tutor’s singing during the sensorimotor phase. The listening/approaching behavior requires previously acquired model memory and the individual variability of approaching behavior correlates with the precision of tutor song imitation. Moreover, it is modulated by dopamine and associated with forebrain regions for sensory processing. Overall, precise vocal learning may involve two steps of auditory processing: a passive imprinting of model memory occurs during the early sensory period; the previously acquired memory then guides an active and selective engagement of the re-exposed model to fine tune model imitation.

Highlights

In the vocal learning model, the juvenile first memorizes a model sound, and the imprinted memory gradually converts into vocal-motor output during the sensorimotor integration
Vocal learning in songbirds consists of two learning phases that overlap to some degree[1]
During the early sensory learning phase, juveniles first passively listen to the song of their adult tutor and form an auditory memory

Summary

Introduction

In the vocal learning model, the juvenile first memorizes a model sound, and the imprinted memory gradually converts into vocal-motor output during the sensorimotor integration. The listening/approaching behavior requires previously acquired model memory and the individual variability of approaching behavior correlates with the precision of tutor song imitation It is modulated by dopamine and associated with forebrain regions for sensory processing. Precise vocal learning may involve two steps of auditory processing: a passive imprinting of model memory occurs during the early sensory period; the previously acquired memory guides an active and selective engagement of the re-exposed model to fine tune model imitation. During the early sensory learning phase, juveniles first passively listen to the song of their adult tutor and form an auditory memory. We show that zebra finches (Taeneopygia guttata) universally develop an auditory learning program that allows juveniles to actively and selectively engage in a previously exposed tutor song for refinement of complex repertoire imitation

Methods

Results

Conclusion