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Social and sensory experiences across the lifespan can shape social interactions, however, experience-dependent plasticity is widely studied within discrete life stages. In the socially monogamous zebra finch, in which females use learned vocal signals to identify individuals and form long-lasting pair bonds, developmental exposure to song is key for females to show species-typical song perception and preferences. While adult mating experience can still lead to pair-bonding and song preference learning even in birds with limited previous song exposure ("song-naive"), whether similarities in adult behavioral plasticity between normally-reared and song-naive females reflect convergent patterns of neural activity is unknown. We investigated this using expression of a marker of neural activity and plasticity (phosphorylated S6) in mated normally-reared and song-naive females in response to song from either their mate, a neighbor, or an unfamiliar male. We found that in portions of a secondary auditory region (the caudomedial nidopallium NCM) and in dopaminergic neurons of the caudal ventral tegmental area hearing the mate's song significantly increased pS6 expression in females from both rearing conditions. In contrast, within other NCM subregions, song-identity drove different patterns of pS6 expression depending on the rearing condition. These data suggest that developmental experiences can have long-lasting impacts on the neural signatures of behaviors acquired in adulthood and that socially-driven behavioral plasticity in adults may arise through both shared and divergent neural circuits depending on an individual's developmental experiences.
Social and sensory experiences across the lifespan can shape social interactions, however, experience-dependent plasticity is widely studied within discrete life stages. In the socially monogamous zebra finch, in which females use learned vocal signals to identify individuals and form long-lasting pair bonds, developmental exposure to song is key for females to show species-typical song perception and preferences. While adult mating experience can still lead to pair-bonding and song preference learning even in birds with limited previous song exposure ("song-naive"), whether similarities in adult behavioral plasticity between normally-reared and song-naive females reflect convergent patterns of neural activity is unknown. We investigated this using expression of a marker of neural activity and plasticity (phosphorylated S6) in mated normally-reared and song-naive females in response to song from either their mate, a neighbor, or an unfamiliar male. We found that in portions of a secondary auditory region (the caudomedial nidopallium NCM) and in dopaminergic neurons of the caudal ventral tegmental area hearing the mate's song significantly increased pS6 expression in females from both rearing conditions. In contrast, within other NCM subregions, song-identity drove different patterns of pS6 expression depending on the rearing condition. These data suggest that developmental experiences can have long-lasting impacts on the neural signatures of behaviors acquired in adulthood and that socially-driven behavioral plasticity in adults may arise through both shared and divergent neural circuits depending on an individual's developmental experiences.
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