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Proc Biol Sci. 2017 Jul 26;284(1859). pii: 20171114. doi: 10.1098/rspb.2017.1114.

Early life manipulations of vasopressin-family peptides alter vocal learning.

Author information

1
Department of Psychology, Cornell University, Ithaca, NY 14853, USA nicole.baran@biology.gatech.edu.
2
School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA.
3
Department of Psychology, Cornell University, Ithaca, NY 14853, USA.
4
Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853, USA.

Abstract

Vocal learning from social partners is crucial for the successful development of communication in a wide range of species. Social interactions organize attention and enhance motivation to learn species-typical behaviour. However, the neurobiological mechanisms connecting social motivation and vocal learning are unknown. Using zebra finches (Taeniopygia guttata), a ubiquitous model for vocal learning, we show that manipulations of nonapeptide hormones in the vasopressin family (arginine vasotocin, AVT) early in development can promote or disrupt both song and social motivation. Young male zebra finches, like human infants, are socially gregarious and require interactive feedback from adult tutors to learn mature vocal forms. To investigate the role of social motivational mechanisms in song learning, in two studies, we injected hatchling males with AVT or Manning compound (MC, a nonapeptide receptor antagonist) on days 2-8 post-hatching and recorded song at maturity. In both studies, MC males produced a worse match to tutor song than controls. In study 2, which experimentally controlled for tutor and genetic factors, AVT males also learned song significantly better compared with controls. Furthermore, song similarity correlated with several measures of social motivation throughout development. These findings provide the first evidence that nonapeptides are critical to the development of vocal learning.

KEYWORDS:

V1a receptor (V1aR); arginine vasopressin (AVP); nonapeptides; social motivation; vocal learning; zebra finch

PMID:
28724738
PMCID:
PMC5543231
DOI:
10.1098/rspb.2017.1114
[Indexed for MEDLINE]
Free PMC Article

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