Neurobiology of Co-Occurring Trauma and Substance Use: Clinical Assessment, Mechanisms, and Integrated Treatment

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Target Audience: Psychologists

Instructional Level: Introductory

CE Course Description

Trauma-related disorders and substance use disorders frequently co-occur and often interact through shared neurobiological mechanisms involving the brain's stress, reward, and executive functioning systems. Rather than representing separate clinical conditions, trauma symptoms and substance use frequently influence one another through cycles of hyperarousal, emotional avoidance, conditioned craving, and maladaptive coping. Understanding these reciprocal relationships is essential for accurate assessment, case formulation, and treatment planning. This course provides psychologists with an evidence-based examination of the neurobiology underlying co-occurring trauma and substance use disorders. Participants will review the roles of the hypothalamic-pituitary-adrenal axis, dopaminergic reward pathways, amygdala hyperactivation, hippocampal functioning, and prefrontal cortical regulation in the development and maintenance of trauma-related symptoms and substance use. The course also explores how chronic substance use alters stress regulation, fear extinction, emotional processing, and executive functioning, contributing to relapse and persistent psychological distress. Clinical application is emphasized throughout the course. Participants will learn strategies for conducting integrated assessments, differentiating overlapping symptom presentations, evaluating risk, and developing comprehensive case formulations. Evidence-based treatment approaches, including trauma-informed substance use treatment, cognitive behavioral therapy, Seeking Safety, eye movement desensitization and reprocessing adaptations, dialectical behavior therapy skills, motivational interviewing, and relapse prevention strategies, are reviewed within a neurobiological framework. This program is designed to meet the Standards and Criteria for Approval of Sponsors of Continuing Education for Psychologists (Standard D), with attention to ethical practice, cultural responsiveness, interdisciplinary collaboration, and the translation of current scientific evidence into effective clinical care. 

Courseware Supervisor: Ryan C. Warner, Ph.D., CRC

Author: Jay Trambadia, Psy.D.

CE Course Objectives

1. Explain the neurobiological mechanisms underlying co-occurring trauma and substance use disorders — including the HPA axis, dopaminergic reward pathways, amygdala, hippocampus, and prefrontal cortex — and how their dysregulation contributes to substance use through negative reinforcement, emotional avoidance, conditioned craving, and impaired stress regulation.
2. Conduct integrated clinical assessments that differentiate trauma-related symptoms from substance intoxication, withdrawal, and other psychiatric presentations.
3. Apply neurobiologically informed case formulation strategies to identify the reciprocal relationships among trauma symptoms, substance use, relapse patterns, and functional impairment.
4. Evaluate evidence-based integrated treatment approaches for co-occurring trauma and substance use disorders, including cognitive behavioral therapy, Seeking Safety, motivational interviewing, DBT skills, and trauma-focused interventions.
5. Develop treatment plans that emphasize stabilization, emotion regulation, relapse prevention, and recovery while addressing the neurobiological mechanisms that contribute to continued substance use.

Course Date: 2026-10-14

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