Somatic Experiencing: what the term means

Somatic Experiencing (SE) is a body-based approach to trauma developed by psychologist Peter Levine, first described in his 1997 book Waking the Tiger. Rather than working mainly through talking, SE directs attention to physical sensation, on the idea that overwhelming experience gets stuck in the nervous system and needs to discharge through the body to resolve.

Where does the term come from?

The word somatic simply means “of the body.” Peter Levine, the psychologist behind Somatic Experiencing, holds a doctorate in biophysics from UC Berkeley. He spent the early 1970s watching how animals in the wild walk away from mortal danger largely unscathed: a gazelle that escapes a predator will often tremble and shake for a minute afterward, then go back to grazing as if nothing happened.

That shaking, Levine concluded, is the nervous system finishing what it started, discharging the surge of survival energy a threat produces. Humans, he observed, tend to override that same instinct with willpower or reasoning, so the energy has nowhere to go. He spent the rest of the 1980s refining the approach, formalized it through the organization now known as Somatic Experiencing International in 1994, and laid it out fully in Waking the Tiger: Healing Trauma, published in 1997.

What techniques does it use?

SE sessions lean on two core moves. Titration keeps a difficult sensation small and manageable, a sliver at a time, instead of diving in all at once. Pendulation has you deliberately swing your attention back and forth between that activation and something calmer in the body, so your system downshifts gradually rather than getting overwhelmed. A 2015 Frontiers in Psychology paper with Levine as a co-author describes the whole method as built around interoception, tuning into internal body sensation, rather than the narrative content of the memory itself.

Is there research behind it?

Some, and it’s honestly mixed. A 2017 randomized controlled trial in the Journal of Traumatic Stress followed 63 adults with PTSD through 15 SE sessions and found significantly lower posttraumatic symptom severity (Cohen’s d 0.94–1.26) and depression (Cohen’s d 0.70–1.08) than a waitlist control. A 2021 scoping review in the European Journal of Psychotraumatology called the overall evidence “promising” but still preliminary, pointing to mixed study quality and a need for more bias-controlled trials.

How is Somatic Experiencing different from EMDR?

Somatic therapy is the broad umbrella term; Somatic Experiencing is one specific, trademarked method within it. SE and EMDR are close cousins, not the same approach: SE uses open-ended sensation tracking with no fixed target memory, while EMDR follows a structured eight-phase protocol built around bilateral stimulation, the left-right rhythm at its center. Our EMDR vs. Somatic Experiencing guide compares the two in full.

EmEase, a self-guided EMDR app, offers the guided version of bilateral stimulation for everyday stress at app.emease.com.