How many sessions does EMDR take?

Session count varies with case complexity. Single-incident adult PTSD may resolve in 6–12 sessions; complex trauma typically requires longer, phased treatment.

Is EMDR only for PTSD?

EMDR was developed for trauma and is best-validated for PTSD, but clinicians also apply it to anxiety, phobias, grief, chronic pain and other adverse-experience presentations.

EMDR Fundamentals

What is EMDR Therapy?

EMDR is an eight-phase psychotherapy for trauma developed by Francine Shapiro. Learn what EMDR is, how it works and what it treats.

Reviewed by the BilateralSync clinical team · Updated June 1, 2026 · 8 min read

Introduction

Eye Movement Desensitization and Reprocessing (EMDR) is an evidence-based psychotherapy developed by Francine Shapiro in the late 1980s. It is designed to help people process distressing memories that have not been fully integrated, and is delivered as a structured eight-phase protocol that includes history-taking, preparation, assessment, desensitization with bilateral stimulation, installation, body scan, closure and reevaluation.

Evidence summary

EMDR is recommended for post-traumatic stress disorder by the World Health Organization, the American Psychological Association, the International Society for Traumatic Stress Studies and NICE. Randomized controlled trials show effects comparable to trauma-focused cognitive behavioural therapy for PTSD.

Clinical use

The eight-phase protocol provides both structure and flexibility. Phases 1 and 2 establish safety, resources and a treatment plan; Phase 3 identifies target memories with image, negative cognition, positive cognition, emotion, body sensation, VoC and SUD; Phase 4 uses bilateral stimulation to desensitize; Phase 5 installs an adaptive positive cognition; Phase 6 scans for residual body tension; Phase 7 ensures the client leaves regulated; Phase 8 reevaluates at the next session. Online delivery preserves this structure — clinicians run exactly the same protocol using a platform like BilateralSync for the BLS component.

Frequently asked questions

What does EMDR stand for?: Eye Movement Desensitization and Reprocessing.
How many sessions does EMDR take?: Session count varies with case complexity. Single-incident adult PTSD may resolve in 6–12 sessions; complex trauma typically requires longer, phased treatment.
Is EMDR only for PTSD?: EMDR was developed for trauma and is best-validated for PTSD, but clinicians also apply it to anxiety, phobias, grief, chronic pain and other adverse-experience presentations.

References

Shapiro, F. (2018). EMDR Therapy: Basic Principles, Protocols and Procedures.
WHO (2013). Guidelines for the management of conditions specifically related to stress.

Bilateral Stimulation

What is Bilateral Stimulation?

Bilateral stimulation (BLS) is alternating left–right sensory input used in EMDR therapy. Learn what it is, how it works and how clinicians use it.

Clinical Practice

EMDR Phase 4: Desensitization

Phase 4 is where bilateral stimulation drives desensitization of the target memory. Learn what happens step-by-step and how to run Phase 4 online.

EMDR Fundamentals

EMDR for PTSD

EMDR is a first-line evidence-based treatment for PTSD. Learn what the guidelines say, what the outcomes look like and how the protocol is applied.

Theory & Research

The Adaptive Information Processing Model

The AIP model is EMDR's theoretical foundation. It explains how memories are stored, why some become 'stuck', and how bilateral stimulation supports processing.