07/17/2026
What exactly is bilateral stimulation (BLS)?
Despite the technical name, it's actually quite simple. Bilateral stimulation is rhythmic, alternating sensory input.
During EMDR therapy, this may involve eye movements, alternating taps, handheld buzzers, sounds, or a combination of these. Together, you and your therapist decide which approach feels most comfortable and works best for you.
Interestingly, bilateral stimulation also occurs naturally during everyday activities like walking, swimming, cycling, jumping jacks, and even rocking back and forth.
That doesn't mean these activities are the same as EMDR. During EMDR, bilateral stimulation is used in a structured, intentional way alongside memories, emotions, body sensations, and beliefs to support the brain's natural processing.
Although researchers continue to study exactly why bilateral stimulation is effective, decades of research support EMDR as an evidence-based treatment for trauma and many other concerns.
What questions do you still have about EMDR?