Glimmers: the opposite of triggers, explained

A glimmer is a small, ordinary moment, like a patch of sunlight, a pet’s greeting, or a favorite song, that cues your nervous system toward safety and ease instead of threat. Therapist Deb Dana coined the term as the deliberate opposite of a trigger: where a trigger pulls your body into defense, a glimmer nudges it toward calm.

Where does the term “glimmers” come from?

Deb Dana, a clinician who translates Stephen Porges’s polyvagal theory into everyday language, introduced “glimmers” in her 2018 book, The Polyvagal Theory in Therapy. She built the word as a direct counterpart to “trigger”: both describe cues your nervous system reads automatically, just pointed in opposite directions. A trigger tells your body danger is here. A glimmer tells it, just for a moment, that things are okay.

How is a glimmer different from a trigger?

Porges calls your nervous system’s constant, below-conscious scan for safety or danger “neuroception,” described in a 2022 paper in Frontiers in Integrative Neuroscience. A trigger is neuroception picking up threat, and it can shift you toward fight, flight, or shutdown before you’ve consciously registered why. A glimmer is the same detection system picking up safety instead, nudging you toward what polyvagal theory calls the ventral vagal state: calmer, more open, easier to think clearly in. Neither is something you decide to feel; the body registers it first.

What do glimmers actually look like?

They’re small on purpose: Dana describes glimmers as micro-moments, often just a few seconds long, not a wave of joy. Common examples include steam curling off a warm drink, a dog’s tail wagging when you walk in, a stranger holding a door, or the first cool morning after a stretch of heat. None of it needs to be remarkable. The word describes the size of the moment, a glimmer rather than a blaze, not the size of what it can do over time.

Is there research behind glimmers?

Honestly, not much yet. “Glimmers” is a clinical translation, not a term that’s been tested in its own controlled studies. It rests on polyvagal theory, which is widely used in trauma-informed care but genuinely disputed among scientists. A 2026 paper in Clinical Neuropsychiatry argued the theory’s core physiological claims don’t hold up.

How can you start noticing more of them?

Dana’s suggestion is simple: when one happens, name it, even silently (“that’s a glimmer”). Naming is meant to help the moment register instead of passing you by, the same logic behind resourcing: deliberately calling up something steadying so it’s easier to find again later. Building any regular calming habit, glimmer-spotting included, supports nervous system regulation more broadly over time. EmEase, a self-guided EMDR app, offers bilateral stimulation at app.emease.com as another way to practice that same steadying skill on your own time, for everyday stress rather than any diagnosed condition.