Oxytocin and the Default Mode Network: New Insights into Attachment and Self-Referential Processing

A review synthesizes evidence that oxytocin, a neuropeptide, interacts with the brain's Default Mode Network (DMN) to influence attachment and self-referential processing. Oxytocin appears to modulate intrinsic connectivity within the DMN, enhancing self-referential thought, social bonding, autobiographical memory, empathy, and social awareness. Dysregulation of this oxytocin-DMN axis may contribute to psychiatric disorders such as autism, social anxiety, and depression. The review evaluates the therapeutic potential of targeting oxytocin signaling to restore DMN functionality, integrating neuroimaging, behavioral, and clinical research to highlight the mechanistic links between hormonal modulation and intrinsic brain network dynamics.

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Abstract

Recent advances in neuroscience have revealed a significant interplay between the neuropeptide oxytocin and the brain’s Default Mode Network (DMN), suggesting a pivotal role in modulating attachment and self-referential processing. This review synthesizes current findings from neuroimaging, behavioral studies, and clinical research to explore the “oxytocin-DMN axis” and its impact on social cognition and emotional regulation. We discuss how oxytocin influences intrinsic connectivity within the DMN, enhancing self-referential thought and social bonding by modulating key network nodes involved in autobiographical memory, empathy, and social awareness. Emerging evidence indicates that dysregulation in this axis may contribute to the neurobiological underpinnings of psychiatric disorders such as autism, social anxiety, and depression. Moreover, we evaluate the therapeutic potential of targeting oxytocin signaling pathways to restore or enhance DMN functionality. By integrating multidisciplinary perspectives, this review provides novel insights into the mechanistic links between hormonal modulation and intrinsic brain network dynamics, underscoring the importance of the oxytocin-DMN axis in the neurobiology of attachment and self-referential processing.