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—caring physical contact between humans—fundamentally shapes brain development from infancy through adulthood. The authors demonstrate that nurturing touch activates specific neural pathways that support emotional regulation, stress response, and attachment formation. They reveal how the absence of appropriate touch during critical developmental periods can lead to lasting deficits in social cognition, emotional processing, and interpersonal relationships, while therapeutic touch interventions can help repair some of these developmental wounds.
Why This Matters for Survivors
Many survivors of narcissistic abuse experienced touch deprivation or inappropriate touch during childhood, creating lasting impacts on their nervous systems and ability to trust. This research validates why survivors often struggle with physical intimacy, have heightened stress responses, and find it difficult to regulate emotions. Understanding how healthy touch shapes development helps survivors recognize that their challenges stem from developmental trauma, not personal failings, and points toward healing approaches that can help rewire these neural pathways.
What This Research Establishes
Social touch is essential for healthy brain development: The research demonstrates that appropriate physical contact during critical developmental periods literally shapes the neural architecture responsible for emotional regulation, stress response, and social connection.
Touch deprivation creates lasting developmental deficits: Children who experience inadequate or inappropriate touch show altered brain development in areas responsible for attachment, emotional processing, and interpersonal relationships, with effects persisting into adulthood.
Affective touch activates specific healing pathways: Gentle, caring touch activates the C-tactile afferent system, which connects directly to brain regions involved in emotional processing and social bonding, distinct from other forms of physical sensation.
Therapeutic touch interventions can support neural repair: While developmental windows are critical, the research shows that appropriate touch-based interventions can help activate neuroplasticity and support healing of attachment-related neural networks throughout life.
Why This Matters for Survivors
If you struggle with physical affection or find touch overwhelming, this research helps explain why. Many survivors of narcissistic abuse experienced touch that was conditional, controlling, or absent during crucial developmental years. When caregivers use touch as a weapon—withdrawing it as punishment or using it inappropriately—it disrupts the very neural pathways meant to create safety and connection.
Your nervous system’s response to touch isn’t a character flaw—it’s an adaptive response to developmental trauma. If gentle touch feels threatening rather than comforting, or if you crave physical connection but simultaneously fear it, you’re experiencing the lasting impact of disrupted touch development. These responses made sense in your childhood environment and protected you from further harm.
Understanding this research can help you approach healing with self-compassion. Your body learned to be vigilant around touch because it had to be. The hypervigilance, the flinching, the conflicted feelings about physical affection—these are normal responses to abnormal childhood experiences.
Recovery can include slowly learning to experience touch as healing rather than threatening. This doesn’t mean you need to enjoy all forms of physical contact, but rather that you can develop choices about touch that honor both your history and your healing journey.
Clinical Implications
This research provides crucial validation for body-based and somatic approaches to treating developmental trauma. Clinicians working with survivors of narcissistic abuse should understand that talk therapy alone may not address the deep neural patterns established through disrupted touch development. Integrating appropriate somatic interventions can help activate the healing pathways that verbal processing cannot reach.
Therapeutic approaches must carefully consider each client’s unique relationship with touch and physical sensation. Some survivors may benefit from gradual exposure to safe, boundaried touch within therapeutic relationships, while others may need extensive preparation before any touch-based interventions. The key is recognizing that touch trauma requires specialized, trauma-informed approaches.
Assessment should include exploration of early touch experiences and current patterns around physical affection and boundaries. Many survivors have never connected their relationship difficulties, emotional dysregulation, or nervous system reactivity to their early touch experiences. Making these connections can be profoundly validating and healing.
Treatment planning should consider how to help clients develop healthier relationships with their own bodies and physical boundaries. This might include somatic awareness practices, boundary-setting skills, or carefully structured experiences with safe, therapeutic touch. The goal is not to push clients toward accepting touch, but to expand their choices and sense of agency around physical connection.
How This Research Is Used in the Book
This foundational research helps explain why so many adult children of narcissists struggle with intimacy, emotional regulation, and physical boundaries. The book draws on these findings to validate survivors’ experiences and point toward healing approaches that address both psychological and somatic dimensions of recovery.
“The research on social touch and development reveals why Sarah’s body went rigid whenever her partner tried to comfort her with a hug. In her narcissistic family system, physical affection was a commodity—offered when she pleased her mother, withdrawn when she didn’t. Her nervous system learned that touch meant manipulation, not comfort. Understanding this allowed her to approach healing not by forcing herself to accept unwanted touch, but by slowly teaching her body that she could have choices and boundaries around physical connection. Recovery became about reclaiming her right to say yes or no to touch based on her own needs, not someone else’s agenda.”
Historical Context
This 2019 review appeared during a period of growing recognition of the importance of embodied and somatic approaches to trauma treatment. Building on decades of attachment research and advances in neuroscience, it provided crucial scientific validation for the role of touch in human development just as clinicians were increasingly incorporating body-based interventions into trauma therapy. The timing was particularly significant for the field of complex trauma treatment, offering biological explanations for the interpersonal and regulatory challenges that characterize survivors of childhood emotional abuse and neglect.
Further Reading
• Field, T. (2014). Touch and human development. In Touch (pp. 95-131). MIT Press. - Comprehensive overview of touch research across the lifespan with implications for therapeutic applications.
• Harlow, H. F. (1958). The nature of love. American Psychologist, 13(12), 673-685. - Classic research on attachment and the fundamental need for physical comfort in healthy development.
• Caldwell, C. (2018). Bodily maps: Recovering embodied awareness and presence. Somatic Studies & Research, 2(1), 12-28. - Contemporary applications of touch and somatic awareness in trauma recovery work.
About the Author
Christopher J. Cascio is Associate Professor of Psychiatry and Behavioral Sciences at Vanderbilt University, specializing in the neuroscience of social touch and sensory processing in autism and developmental disorders.
David Moore is Professor of Psychology at Pitzer College and Claremont Graduate University, focusing on infant development, particularly the role of sensory experience in shaping early brain development and behavior.
Francis McGlone is Professor of Neuroscience at Liverpool John Moores University, a leading researcher in affective touch and the neural mechanisms underlying social and emotional aspects of tactile perception.
Historical Context
Published during a surge of interest in embodied approaches to trauma treatment, this 2019 review synthesized decades of research on touch and development, providing crucial scientific backing for body-based therapeutic interventions and highlighting the profound developmental consequences of touch deprivation.
Frequently Asked Questions
Touch deprivation during critical developmental periods can lead to difficulties with emotional regulation, heightened stress responses, and challenges with physical and emotional intimacy in adult relationships, as the neural pathways for healthy attachment and social connection may not develop properly.
Research suggests that appropriate therapeutic touch interventions can help activate healing neural pathways and support emotional regulation, though this work must be done carefully with trauma-informed practitioners who understand the complex relationship between touch and trauma.
Survivors often experienced inappropriate, conditional, or absent touch during development, which can create lasting neural patterns that make physical affection feel threatening, overwhelming, or triggering rather than comforting and connecting.
Social touch activates specific neural pathways that support emotional regulation, stress response systems, and attachment formation. During critical developmental periods, appropriate touch literally shapes how the brain develops its capacity for social connection and emotional processing.
Discriminative touch provides information about texture, pressure, and location, while affective touch (slow, gentle stroking) specifically activates emotional and social neural pathways that support bonding, comfort, and emotional regulation—this is the type of touch often missing in narcissistic family systems.
Yes, the brain maintains plasticity throughout life, and with appropriate therapeutic support, survivors can gradually develop more positive associations with healthy touch and learn to use touch as a tool for emotional regulation and connection.
Narcissistic parents may use touch as a tool for control, withdrawing affection as punishment, being physically intrusive without regard for boundaries, or providing touch only when it serves their emotional needs rather than the child's developmental needs.
Appropriate social touch helps regulate the nervous system by activating the parasympathetic nervous system, reducing stress hormones like cortisol, and releasing bonding hormones like oxytocin, which supports emotional balance and feelings of safety and connection.