Neurophysiological Effects of Childhood Trauma on Mental and Physical Health: A Multivariate Relationship and Dataset Analysis

Abstract Introduction: Childhood trauma, commonly defined as adverse childhood experiences (ACEs), has been strongly associated with long-term impairments in mental and physical health. Advances in neuroscience have demonstrated that early-life stress alters brain development, disrupts stress-response systems, and contributes to psychiatric and behavioral disorders. This paper reviews current peer-reviewed literature on the neurobiological effects of childhood trauma, including structural and functional brain changes, dysregulation of the hypothalamic–pituitary–adrenal (HPA) axis, and large-scale neural network alterations. Additionally, evidence-based therapeutic interventions, including play therapy and nature-based interventions, are examined through a neurobiological framework. Findings suggest that early intervention may promote neuroplasticity and mitigate long-term consequences. Objective: To review the neurobiological mechanisms underlying childhood trauma and evaluate evidence-based therapeutic interventions. Methods: A narrative review of peer-reviewed neuroscience and psychological literature was conducted, focusing on structural and functional neuroimaging, stress physiology, and intervention studies. Results: Childhood trauma is associated with reduced cortical thickness and gray matter volume, particularly in the prefrontal cortex and anterior cingulate cortex. Dysregulation of the hypothalamic–pituitary–adrenal (HPA) axis results in prolonged cortisol exposure, impairing hippocampal neurogenesis. Functional neuroimaging demonstrates altered connectivity within the default mode, salience, and executive control networks. Evidence from neuroimaging datasets and mathematical supports disrupted amygdala–prefrontal connectivity. Therapeutic interventions such as play therapy and nature-based interventions show promise in improving emotional regulation and reducing stress-related physiological markers. Conclusion: Childhood trauma significantly alters brain development and stress-response systems. Early, developmentally appropriate interventions may promote neuroplasticity and improve long-term outcomes.