Peter Levine
Trauma is not what happens to you—it's what happens inside you as a result.
Biography
American psychotherapist who developed Somatic Experiencing (SE) by observing that wild animals discharge traumatic stress through involuntary physical movements—trembling, shaking, deep breathing—while humans, who inhibit these responses through social conditioning, get stuck. His framework treats trauma not as a cognitive event but as an incomplete physiological response: energy mobilized for survival that was never discharged.
Key Ideas
Incomplete defensive responses: trauma occurs when survival response is interrupted.Pendulation: natural oscillation between activation and calm.Titration: approaching traumatic material in small doses.Discharge: the body's capacity to release stored survival energy.
Clinical Relevance
Levine's core contribution is reframing trauma as physiology rather than biography. The traumatic event is less important than the body's unfinished response to it—the fight that was never fought, the flight that was never completed, the freeze that never thawed. SE works by carefully titrating attention to bodily sensations (pendulation between activation and calm), allowing the nervous system to complete defensive responses that were interrupted during the traumatic event. This has specific clinical implications: processing trauma too quickly overwhelms the system and retraumatizes. Levine's approach is inherently cautious, working at the edge of activation rather than plunging into the traumatic material—the opposite of cathartic approaches that encourage emotional flooding.