Autonomic Nervous System (ANS)

Body of Knowledge of Psychotraumatology

Adaptations of Trauma

Traumatic stress reactions are increasingly understood as adaptive responses to abnormal threat, rather than arbitrary “symptoms.” In the face of overwhelming events, the brain and body employ survival-based coping mechanisms that allow the individual to endure and function (Van der Kolk, 2014). These adaptations occur on multiple levels – neurobiological, behavioral, and physiological – and

Body of Knowledge of Psychotraumatology

ANS Regulation Theory: Understanding Trauma Responses

Babette Rothschild, a prominent psychotherapist and trauma specialist, provides a detailed understanding of trauma through her theory of Autonomic Nervous System (ANS) Regulation (Rothschild, 2000, 2017). Rothschild’s work emphasizes how trauma profoundly affects the autonomic nervous system, influencing individuals' physiological reactions and emotional experiences. Autonomic Nervous System and Trauma Rothschild's model builds on the foundation

Body of Knowledge of Psychotraumatology

Attachment Theory and Trauma

Attachment theory, initially developed by John Bowlby, has evolved to incorporate neurobiological findings and to illuminate the impact of early relational trauma on development. A secure attachment in infancy (formed through consistent, attuned caregiving) is now understood as a primary protector against the harmful effects of stress (Schore, 2001). By contrast, trauma in the context

Body of Knowledge of Psychotraumatology

Dysregulation as a Core Mechanism

A common thread woven throughout trauma-related disorders is the phenomenon of dysregulation—the impairment in managing emotional and physiological states. Contemporary trauma theorists now widely regard dysregulation of arousal and affect as central to understanding the persistence of trauma symptoms (Van der Kolk, 2014). Individuals who have experienced trauma often struggle to maintain emotional stability, fluctuating

Body of Knowledge of Psychotraumatology

How the Body Keeps the Score and Neuroscience of Trauma in the Body

The influential work of Bessel van der Kolk (2014) has profoundly shaped contemporary trauma theory by articulating the deep neurobiological and somatic imprints trauma leaves on the body. Van der Kolk emphasizes that traumatic experiences are not merely psychological events but profoundly embodied phenomena, reflected and stored throughout the nervous and somatic systems long after

Body of Knowledge of Psychotraumatology

Memory and Trauma

Memory plays a pivotal role in trauma, influencing how traumatic experiences are encoded, stored, and recalled. Understanding traumatic memory formation and reconsolidation is essential for effective trauma therapy. Current neuroscientific findings suggest that traumatic memories differ fundamentally from ordinary memories, presenting unique challenges for therapeutic intervention (Brewin, 2011; Van der Kolk, 2014). How Traumatic Memory

Body of Knowledge of Psychotraumatology

Polyvagal Theory

Polyvagal Theory, developed by neuroscientist Stephen Porges, has significantly transformed contemporary understandings of trauma, emphasizing the critical role of the autonomic nervous system in trauma responses and healing (Porges, 2011). At its core, Polyvagal Theory provides a biological framework for understanding safety, danger, and life-threatening states, fundamentally reshaping how clinicians conceptualize and address trauma. Foundations

Evidence-Based Trauma Therapies and Models

Eye Movement Desensitization and Reprocessing (EMDR)

Eye Movement Desensitization and Reprocessing (EMDR) therapy, originally developed by Francine Shapiro in the late 1980s, is a structured, integrative psychotherapeutic approach specifically designed to alleviate distress associated with traumatic memories. EMDR uniquely integrates cognitive, emotional, somatic, and neurological components, employing bilateral stimulation—most commonly eye movements—to facilitate the reprocessing of traumatic memories. Foundational Principles of

Evidence-Based Trauma Therapies and Models

Neurosequential Model of Therapeutics (NMT)

Overview The Neurosequential Model of Therapeutics (NMT), developed by Dr. Bruce Perry, is a developmentally informed, neurobiologically grounded framework for assessing and treating children, adolescents, and adults with histories of trauma, neglect, and disrupted attachment. NMT is not a standalone therapy, but rather a clinical map that guides the selection, sequencing, and timing of interventions

Evidence-Based Trauma Therapies and Models

Polyvagal Theory–Informed Therapies

Polyvagal Theory–Informed Therapies (PVTT) are trauma treatment approaches based on the polyvagal theory developed by Stephen Porges (2011, 2017). They integrate an understanding of the autonomic nervous system’s hierarchical responses to threat and safety into therapeutic interventions, aiming to restore nervous system flexibility, emotional regulation, and a sense of safety. Foundational Principles Polyvagal theory posits

Evidence-Based Trauma Therapies and Models

Somatic and Sensorimotor Psychotherapy

Somatic and Sensorimotor Psychotherapies represent trauma-informed approaches explicitly designed to engage and resolve trauma at the bodily level. These methodologies integrate principles of neuroscience, trauma theory, and somatic psychology to address physiological symptoms and somatic memory of trauma effectively. Foundational Principles Somatic psychotherapies view trauma as fundamentally embedded within the nervous system and body tissues,

Neurobiology of Trauma

Applying Neurobiology Principles to Trauma Treatment

Rationale for Neurobiologically-Informed Therapy Understanding trauma as a neurobiological condition offers profound implications for therapeutic practice. First, it allows clinicians to reframe trauma-related symptoms not as signs of character pathology or weakness, but as predictable consequences of disrupted brain-body systems (van der Kolk, 2014). This reframing is inherently validating: survivors can begin to understand that

Neurobiology of Trauma

Autonomic Nervous System and Polyvagal Theory

Another crucial physiological component in trauma is the autonomic nervous system (ANS), which governs involuntary bodily functions and modulates states of arousal and rest. The ANS is divided into two primary branches: the sympathetic nervous system (associated with fight-or-flight responses) and the parasympathetic nervous system (linked to rest, digestion, and repair). Trauma causes profound dysregulation

Neurobiology of Trauma

Neurobiological Imprints of Trauma

Decades of research in psychotraumatology and neuroscience have mapped out how traumatic experiences alter key brain regions and physiological pathways. Researchers have long observed that trauma is “stored in somatic memory and expressed as changes in the biological stress response” (van der Kolk, 1994, p. 253). Intense emotional trauma triggers a cascade of neurochemical and

The Triphasic Model for Treating Trauma

Phase One: Safety and Stabilization

Safety and stabilization constitute the essential first phase of trauma recovery, fundamentally shaping the effectiveness of all subsequent therapeutic interventions. Given trauma’s inherent nature—characterized by chaos, overwhelm, loss of control, and feelings of unsafety—establishing a secure foundation is a non-negotiable prerequisite for successful healing (Herman, 1992; Courtois & Ford, 2013). Primary Objectives: Establishing Physical, Emotional,

Trauma

Intrauterine & Pre‑Verbal Trauma

Defining the Concept Intrauterine trauma refers to stressors experienced prenatally—such as maternal stress, emotional distress, substance exposure, or prenatal medical complications—that can affect fetal development. Pre‑verbal trauma occurs before the acquisition of language, including birth trauma, early neglect, or abuse, which profoundly impacts implicit memory systems. Both operate outside conscious awareness and are carried in

Trauma

Vicarious and Secondary Trauma

Definition and Identification (Impact on Caregivers, Therapists, First Responders) Vicarious trauma, also known as secondary trauma, refers to the emotional and psychological impact experienced by individuals who regularly support or provide care to trauma survivors. Rather than resulting from direct trauma exposure, vicarious trauma emerges indirectly through empathic engagement, continual exposure to traumatic narratives, or