APA Citation
Cascio, C., Moore, D., & McGlone, F. (2019). Social touch and human development. *Developmental Cognitive Neuroscience*, 35, 5-11. https://doi.org/10.1016/j.dcn.2018.04.009
Summary
This comprehensive review examines how social touch—hugs, gentle contact, and affectionate physical interaction—shapes critical aspects of human development from infancy through adulthood. The researchers demonstrate how touch activates specific neural pathways that regulate emotional bonding, stress response, and social connection. The study reveals that healthy touch experiences in early life establish foundational patterns for trust, emotional regulation, and interpersonal relationships, while touch deprivation or inappropriate touch can disrupt these developmental processes with lasting consequences.
Why This Matters for Survivors
Many survivors of narcissistic abuse experienced touch that was manipulative, conditional, or weaponized as control. This research validates how early touch experiences shape our capacity for healthy relationships and emotional regulation. Understanding the neuroscience of social touch helps survivors recognize why boundary violations feel so damaging and why healing touch—whether through therapy, safe relationships, or self-care—can be profoundly restorative to both body and mind.
What This Research Establishes
Touch is fundamental to healthy neurobiological development, activating specific neural pathways that regulate emotional bonding, stress response, and social connection from infancy through adulthood.
Early touch experiences create lasting patterns for trust, emotional regulation, and interpersonal relationships, with healthy touch building resilience and inappropriate touch potentially disrupting these critical developmental processes.
The nervous system distinguishes between different types of touch, with gentle, appropriate social touch activating C-tactile afferents that promote calm, connection, and emotional regulation.
Touch deprivation or boundary violations have measurable neurobiological consequences, affecting stress hormone regulation, attachment capacity, and the ability to form secure relationships throughout life.
Why This Matters for Survivors
If you experienced narcissistic abuse, your relationship with touch was likely complicated by manipulation, boundary violations, or conditional affection. This research validates what many survivors instinctively know—that when touch becomes a tool of control, it can profoundly impact your sense of safety and connection. Your nervous system learned to be cautious about physical contact for good reason.
Understanding that healthy touch is supposed to feel safe, consensual, and nurturing can help you recognize the difference between appropriate affection and manipulative contact. Many survivors struggle with physical affection even in safe relationships because their nervous system remains hypervigilant. This is a normal protective response, not a personal failing.
The research shows that your capacity for healthy touch can be restored through patient, trauma-informed approaches. Whether through therapeutic work, mindful self-care, or gradually building trust in safe relationships, your nervous system can learn to receive nurturing touch again. This healing happens at your pace and always within your control.
Your boundaries around touch are valid and important. Healing doesn’t mean you have to become comfortable with all forms of physical contact—it means developing the ability to choose what feels safe and nurturing for you while maintaining clear, respected boundaries.
Clinical Implications
Clinicians working with narcissistic abuse survivors must recognize that touch responses are often dysregulated and hypervigilant. Any therapeutic interventions involving touch should be approached with extreme caution, clear informed consent, and deep understanding of how boundary violations create lasting neurobiological changes. Survivors need to maintain complete control over any physical contact in therapeutic settings.
The research supports somatic and body-based therapeutic approaches that help survivors rebuild their relationship with their physical selves. Techniques like mindful breathing, progressive muscle relaxation, or self-directed movement can help restore nervous system regulation without requiring interpersonal touch. These approaches honor the body’s wisdom while respecting protective responses.
Understanding the neurobiology of social touch helps clinicians validate survivors’ experiences and normalize their protective responses. When clients understand that their hypervigilance around touch is a neurobiological adaptation to trauma, it reduces self-blame and supports the healing process. Education about healthy versus manipulative touch can be profoundly validating.
Treatment planning should include gradual, client-directed exploration of boundaries and consent around physical contact. Survivors need opportunities to practice saying no, setting limits, and experiencing their boundaries being respected. This might begin with self-touch exercises and progress to interpersonal boundaries as the client feels ready and safe.
How This Research Is Used in the Book
Narcissus and the Child integrates this developmental touch research to help survivors understand how early relational patterns, including physical boundaries and affection, shape their adult capacity for healthy relationships. The book explores how narcissistic caregivers often use touch as a tool of control rather than genuine nurturing.
“The research on social touch and development reveals something profound: our nervous system is designed to seek safe, nurturing physical connection from our earliest moments. When that touch becomes conditional, manipulative, or boundary-violating, it doesn’t just hurt our feelings—it disrupts the very neural pathways meant to help us feel safe and connected. Understanding this helps survivors recognize that their caution around physical affection isn’t weakness or damage; it’s their nervous system’s wisdom protecting them from further harm.”
Historical Context
This 2019 review emerged during a pivotal period in trauma research, as neuroscientists increasingly understood how early relational experiences shape brain development. The work built on decades of attachment research and contributed to growing clinical recognition of somatic and body-based approaches to trauma healing. It provided crucial neurobiological evidence for therapeutic interventions that honor the body’s role in both trauma and recovery.
Further Reading
• Field, T. (2014). Touch and physical development. International Journal of Behavioral Development, 38(1), 1-9.
• Champagne, T. (2011). Sensory processing research advances and clinical applications in trauma treatment. International Journal of Therapeutic Communities, 32(3), 175-195.
• Morrison, I. (2016). Keep calm and cuddle on: Social touch as a stress buffer. Adaptive Human Behavior and Physiology, 2(4), 344-362.
About the Author
Christopher J. Cascio is Associate Professor of Psychiatry and Behavioral Sciences at Vanderbilt University, specializing in sensory processing and social neuroscience with particular focus on autism and developmental differences.
David Moore is Professor of Psychology at Pitzer College, renowned for his research on early human development, infant behavior, and the role of sensory experience in shaping neural development.
Francis McGlone is Professor of Neuroscience at Liverpool John Moores University, a leading expert on the neurobiology of touch and emotional processing, particularly the role of C-tactile afferents in social bonding.
Historical Context
Published in 2019, this review synthesized decades of touch research during a period of growing recognition of trauma's developmental impact. The work emerged as clinicians increasingly understood how early relational trauma affects neurobiological development, providing crucial evidence for touch-informed therapeutic approaches.
Frequently Asked Questions
Narcissistic abuse often involves touch that's manipulative, conditional, or boundary-violating, which can disrupt survivors' natural capacity for healthy physical connection and make them hypervigilant about physical boundaries.
When touch has been used as a tool of control or manipulation, the nervous system learns to associate physical contact with danger, creating protective responses that can persist even in safe relationships.
Yes, appropriate therapeutic touch, consensual affection in safe relationships, and mindful self-touch can help rewire the nervous system's responses and restore the capacity for healthy physical connection.
Healthy touch activates neural pathways that support emotional regulation, stress resilience, and social bonding, creating foundational patterns for trust and interpersonal connection throughout life.
Lack of appropriate touch can impair emotional regulation, stress response systems, and the capacity for healthy attachment, potentially leading to difficulties with trust and intimacy later in life.
Healthy touch is consensual, appropriate, and nurturing, while unhealthy touch may be coercive, boundary-violating, conditional, or used as a tool for control or manipulation.
Through therapy, mindful self-care practices, clear boundary setting, and gradually building trust in safe relationships where touch is consensual and respectful.
Therapists should understand that touch responses are often dysregulated in trauma survivors and should approach any touch-related interventions with extreme sensitivity, clear consent, and trauma-informed awareness.