Somatic Experiencing (SE) Therapy: Peter Levine's Approach to Trauma Healing

Have you ever felt like your body is still bracing against something that happened years ago? Like some part of you never fully relaxed after a traumatic event, even though the danger has long passed?

That persistent tension, hypervigilance, or sense of being stuck is not a personal failing. It is your nervous system holding onto incomplete survival responses—and Somatic Experiencing (SE) was developed specifically to help your body complete what trauma left unfinished.

Somatic Experiencing is a body-based trauma therapy created by Dr. Peter Levine that works directly with the autonomic nervous system to resolve trauma symptoms. Rather than requiring you to retell or relive traumatic events, SE guides your attention to internal body sensations and helps your nervous system complete the defensive responses—fight, flight, freeze—that trauma interrupted. The approach has been studied for more than four decades and shows promise for treating PTSD, complex trauma, and chronic stress.

As both a Licensed Clinical Social Worker and a Registered Yoga Teacher trained in body-based approaches, I see SE as one of the most precise and nervous-system-focused trauma therapies available. It is not the only approach, but for people whose bodies remain stuck in survival mode long after the original events ended, SE offers a path toward resolution.

Who Developed Somatic Experiencing?

Peter A. Levine, PhD, created Somatic Experiencing over the past 50 years as what he describes as "a naturalistic and neurobiological approach to healing trauma." Levine holds a doctorate in Biophysics from UC Berkeley and a doctorate in Psychology, and he has spent decades studying how trauma affects the autonomic nervous system.

A pivotal moment in SE's development came in 1978 when Levine met Dr. Stephen Porges, the researcher who later developed polyvagal theory. Their shared interest in bottom-up processing and the autonomic nervous system heavily shaped SE's core principles. Levine's own childhood experiences with trauma also informed his work—what he calls "me-search" rather than pure research.

Levine's key insight: animals in the wild regularly face life-threatening events but rarely develop lasting trauma symptoms. A gazelle chased by a predator will flee, and if it escapes, it will discharge the mobilized survival energy through trembling and shaking before returning to grazing. The gazelle's nervous system completes the cycle. Humans, by contrast, often suppress these natural discharge mechanisms, and that unresolved activation becomes chronic dysregulation.

Somatic Experiencing was designed to help humans do what animals do instinctively: complete the body's interrupted survival responses in a way that allows the nervous system to return to equilibrium.

How Is Somatic Experiencing Different from Other Trauma Therapies?

Most trauma therapies work primarily through cognition and narrative. Cognitive Processing Therapy asks you to examine and reframe beliefs about the trauma. Prolonged Exposure asks you to revisit traumatic memories repeatedly until they lose their emotional charge. EMDR uses bilateral stimulation while you recall distressing images.

Somatic Experiencing takes a different route. SE is a bottom-up therapy, meaning it works through body sensations rather than thoughts or memories. The therapist guides your attention to what you are noticing physically—tightness in your chest, heaviness in your limbs, a flutter in your stomach—and tracks how those sensations shift and change.

SE does not require you to talk about what happened. You can if it is helpful, but the focus stays on your internal experience in the present moment, not on reconstructing the traumatic narrative. Many trauma survivors find this relieving. You do not need to relive the event at full intensity to heal from it.

The work is also highly regulated. SE proceeds slowly and carefully, never overwhelming your nervous system. This makes it particularly well-suited for people with complex trauma histories who have tried exposure-based therapies and found them destabilizing.

What Does the Research Show About Somatic Experiencing?

Somatic Experiencing's evidence base is still growing, with fewer large-scale randomized controlled trials (RCTs) compared to more established therapies like Cognitive Behavioral Therapy or Prolonged Exposure. However, the research that exists is promising.

The first randomized controlled trial evaluating SE for PTSD was published in 2017 by Brom and colleagues in the Journal of Traumatic Stress. The study included 63 participants who met full diagnostic criteria for PTSD. Participants were randomly assigned to receive 15 weekly SE sessions or to a waitlist control group.

The results showed large effect sizes for both PTSD severity (Cohen's d = 0.94–1.26) and depression symptoms (Cohen's d = 0.70–1.08). By the end of treatment, 44.1% of participants in the SE group no longer met criteria for PTSD, and these gains were maintained at follow-up (Brom et al., 2017).

While these results are encouraging, the research base remains modest compared to therapies with decades of large-scale trials. SE appears to be effective for trauma survivors, particularly those with autonomic nervous system dysregulation and complex trauma histories, but more rigorous research is needed to establish its place within trauma treatment guidelines.

What Are the Core Techniques in Somatic Experiencing?

Somatic Experiencing uses several foundational techniques to help the nervous system move from survival states back toward regulation.

Titration: Working in Small Doses

Titration is the practice of approaching traumatic material in very small amounts—just a drop at a time. SE does not ask you to dive into the full intensity of a traumatic memory. Instead, the therapist guides you to notice a small piece of what you are feeling in your body, stay with it briefly, and then shift attention elsewhere.

This prevents your nervous system from becoming overwhelmed or retraumatized. Trauma is not held in the event itself but in the body's uncompleted survival responses. By working with those responses in manageable increments, SE allows the nervous system to process what it could not process during the original event.

Pendulation: Shifting Between Contraction and Expansion

Pendulation is the rhythmic movement between states of activation (the "trauma vortex") and states of ease or resourcefulness (the "healing vortex"). The therapist guides you to notice a difficult sensation—tightness, tension, numbness—and then gently shift your attention to a place in your body or in your environment that feels neutral or even pleasant.

This oscillation teaches your nervous system that distress is not permanent. Many trauma survivors are stuck in one state, either hyperactivated or shut down, because their system has lost the capacity to move fluidly between states. Pendulation restores that flexibility.

Tracking Sensations

In SE, the therapist asks you to track internal body sensations with curiosity. Where exactly do you feel that tightness? Does it have a size, shape, temperature, texture? Does it change as you pay attention to it?

This process, called interoception, helps you rebuild awareness of your internal physical state. Many trauma survivors have learned to disconnect from their bodies because the body holds overwhelming sensations. SE gently restores that connection in a way that feels safe and manageable.

Discharge and Completion

Trauma often leaves the body with mobilized survival energy that never got discharged. You prepared to fight or flee, but you froze instead. Or you did flee, but the danger kept coming and your system never signaled that you were safe.

SE helps the body complete those interrupted responses. This might look like spontaneous trembling, shaking, deep sighing, yawning, or subtle movements. These are signs that your nervous system is releasing stored activation. The process is involuntary—your body does it when the conditions feel safe enough.

What Does a Somatic Experiencing Session Look Like?

SE sessions are conversational and guided. You remain fully clothed, seated or lying down, and the therapist does not use physical touch unless you explicitly request it and it serves the therapeutic process.

A session typically begins with a check-in: How are you feeling as you arrive? What do you notice in your body right now? From there, the therapist might ask you to bring your attention to a particular sensation or to an issue you want to work on. The therapist tracks what you describe and guides your attention in ways that support nervous system regulation.

If you begin to feel activated—heart racing, tension rising—the therapist will help you titrate, pulling back from the intensity and guiding you toward a resource or a place of greater ease. If you begin to feel shut down or numb, the therapist might invite gentle movement or curiosity to bring you back into connection with your body.

The pacing is slow. SE does not rush. Processing happens at the speed your nervous system can handle, not the speed your mind thinks it should go.

I have written more about what somatic therapy sessions feel like in practice in my post on what a somatic therapy session actually looks like.

How Is Somatic Experiencing Different from TRE?

Somatic Experiencing and Tension and Trauma Releasing Exercises (TRE) are both body-based trauma therapies that work with the nervous system's natural discharge mechanisms, but they differ significantly in structure and approach.

Somatic Experiencing is a relational, therapist-guided process. The work is precise, attuned, and deeply collaborative. The therapist tracks your nervous system responses moment by moment and adjusts the session accordingly. SE requires a trained clinician and often engages directly with specific traumatic material through sensation rather than narrative.

TRE is a self-directed practice that uses a series of exercises to activate neurogenic tremors—involuntary shaking that helps discharge stored tension. Once you learn the exercises from a certified TRE provider, you can practice independently at home. TRE does not require you to discuss traumatic memories or work with a therapist each time you practice.

As one comparison describes it: TRE invites the body to release through movement, while SE guides release through awareness. Both are valuable, and many practitioners use them together as complementary tools.

I have written more about how TRE works in my post on Tension and Trauma Releasing Exercises.

Who Benefits from Somatic Experiencing?

Somatic Experiencing can help a wide range of trauma survivors, but it is particularly effective for:

• People with complex trauma or developmental trauma whose nervous systems are chronically dysregulated. SE's slow, titrated approach prevents retraumatization.
• Trauma survivors who have tried talk therapy but still feel stuck. If you understand your patterns intellectually but your body has not caught up, SE bridges that gap.
• People who dissociate or shut down easily. SE teaches your nervous system to stay present with difficult material without collapsing into numbness.
• People whose trauma involved freeze or immobility. SE specifically addresses the incomplete defensive responses that keep you stuck in shutdown.
• Adult children of alcoholics or addicts (ACOA) who grew up in unpredictable, high-stress environments and learned to brace against constant threat. I have written more about how childhood trauma patterns persist in the body in my post on intergenerational trauma.
• Anyone with chronic hypervigilance, tension, or a nervous system that feels stuck in survival mode.

Can You Do Somatic Experiencing in Telehealth?

Yes. While SE was originally developed for in-person work, it translates well to telehealth because the approach centers on your internal experience rather than requiring physical touch. The therapist guides your attention through verbal cues, and you practice noticing and responding to your body's signals from the comfort of your own space.

Many clients find that the familiarity of their home environment actually helps them feel safe enough to do deeper work.

How Does Somatic Experiencing Fit with Other Therapies?

SE is not an all-or-nothing approach. In my practice, I integrate somatic awareness with Cognitive Behavioral Therapy, psychodynamic therapy, and other modalities depending on what each client needs. Some sessions are more body-focused. Some are more conversational. Most are a blend.

The integration of approaches is important because healing is not one-dimensional. Understanding why you react the way you do (cognitive work) and helping your body release the patterns it has been holding (somatic work) together create change that is deeper and more lasting than either approach alone.

Your Nervous System Can Complete What Trauma Left Unfinished

One of the most hopeful aspects of Somatic Experiencing is its underlying premise: your nervous system already knows how to heal. Trauma interrupted your body's natural completion process, but with the right guidance and conditions, that process can resume.

SE does not erase what happened. It does not promise that trauma will disappear. But it offers your body a chance to finish what it started—to discharge the stored survival energy, to complete the interrupted defensive responses, and to return to a state where regulation and healing become possible again.

Healing from trauma requires more than one tool. It requires patience, support, and often multiple modalities working together. Somatic Experiencing is one evidence-informed approach that can help your nervous system remember what safety feels like.

As both a Licensed Clinical Social Worker and a Registered Yoga Teacher trained in body-based approaches, I work with clients who are exploring somatic practices for trauma healing. I offer trauma therapy in-person in Alpharetta, Georgia, with telehealth available throughout Georgia, Florida, and South Carolina. If you are curious whether Somatic Experiencing or other body-based trauma work might support your healing, you can reach out to schedule a consultation.

References

Brom, D., Stokar, Y., Lawi, C., Nuriel-Porat, V., Ziv, Y., Lerner, K., & Ross, G. (2017). Somatic Experiencing for posttraumatic stress disorder: A randomized controlled outcome study. Journal of Traumatic Stress, 30(3), 304–312. https://pmc.ncbi.nlm.nih.gov/articles/PMC5518443/