Journal
FRONTIERS IN BEHAVIORAL NEUROSCIENCE
Volume 7, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fnbeh.2013.00185
Keywords
oxytocin; sociality; social behavior; maternal behavior; pair bond; aggression; voles; group living
Categories
Funding
- NSF [IOS-1247162]
- Eveillard Postdoctoral Fellowship
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [1257162] Funding Source: National Science Foundation
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In recent decades, scientific understanding of the many roles of oxytocin (OT) in social behavior has advanced tremendously. The focus of this research has been on maternal attachments and reproductive pair bonds, and much less is known about the substrates of sociality outside of reproductive contexts. It is now apparent that OT influences many aspects of social behavior including recognition, trust, empathy, and other components of the behavioral repertoire of social species. This review provides a comparative perspective on the contributions of OT to life in mammalian social groups. We provide background on the functions of OT in maternal attachments and the early social environment, and give an overview of the role of OT circuitry in support of different mating systems. We then introduce peer relationships in group-living rodents as a means for studying the importance of OT in non-reproductive affiliative behaviors. We review species differences in oxytocin receptor (OTR) distributions in solitary and group-living species of South American tuco-tucos and in African mole-rats, as well as singing mice. We discuss variation in OTR levels with seasonal changes in social behavior in female meadow voles, and the effects of OT manipulations on peer huddling behavior. Finally, we discuss avenues of promise for future investigation, and relate current findings to research in humans and nonhuman primates. There is growing evidence that OT is involved in social selectivity, including increases in aggression toward social outgroups and decreased huddling with unfamiliar individuals, which may support existing social structures or relationships at the expense of others. OT's effects reach beyond maternal attachment and pair bonds to play a role in affiliative behavior underlying friendships, organization of broad social structures, and maintenance of established social relationships with individuals or groups.
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