Social vocalizations can release oxytocin in humans

Central vasopressin and oxytocin receptor distributions in two species of singing mice

(2009) Polly Campbell et al.   JOURNAL OF COMPARATIVE NEUROLOGY

Oxytocin protects against negative behavioral and autonomic consequences of long-term social isolation

(2009) Angela J. Grippo et al.   PSYCHONEUROENDOCRINOLOGY

SOCIAL SCIENCE: Friendship as a Health Factor

(2009) J. Couzin   SCIENCE

Evolutionary Origins for Social Vocalization in a Vertebrate Hindbrain-Spinal Compartment

(2008) A. H. Bass et al.   SCIENCE

Oxytocin, Vasopressin, and the Neurogenetics of Sociality

(2008) Z. R. Donaldson et al.   SCIENCE

Attachment, aggression and affiliation: The role of oxytocin in female social behavior

(2007) Anne Campbell   BIOLOGICAL PSYCHOLOGY