EMDR fundamentals: what it is, how it works and the 8 phases
EMDR is a structured psychotherapy, not an isolated eye-movement technique. This page brings together the essential concepts needed to understand the model, the full protocol, target-memory selection and the scientific explanations that remain open.
Understanding EMDR requires separating four elements: the complete therapy, its eight phases, dual attention with bilateral stimulation, and theories about mechanism. Clinical evidence for certain problems does not by itself establish one definitive neurological explanation.
EMDR is a complete treatment
The name stands for Eye Movement Desensitization and Reprocessing, but treatment includes history taking, planning, preparation, assessment, processing, installation, body scan, closure and reevaluation. Not every appointment includes eye movements or direct work with difficult memories.
Bilateral stimulation may involve eye movements, alternating sounds or tapping. It is used while a person briefly attends to parts of an experience and notices what emerges, within an agreed plan and with the ability to stop.
Protocol, model and mechanism are different questions
The eight phases describe how the intervention is organised. The Adaptive Information Processing model offers a clinical account of why some experiences remain easily triggered. Working-memory hypotheses examine what the dual task may contribute.
These accounts should not be presented as a settled explanation of the brain. Several processes may contribute to change. Responsible information separates observed outcomes, clinical models and experimental hypotheses.
How to use this collection
Begin with the general introduction and then review the eight phases. To go deeper, explore bilateral stimulation, target memories and the AIP model. The guide to what happens in a session connects these elements to practice.
Understanding the method cannot determine whether it is suitable for you. That decision requires assessment of goals, diagnosis or formulation, stability, risk, dissociation, support, alternatives and preferences with an eligible professional.
Guides in this collection
Each guide answers a specific intent, links its sources and states where the evidence ends.
- 01ESSENTIAL GUIDEWhat is EMDR therapy? Meaning, phases and evidence→
What EMDR stands for, how therapy is structured, where evidence is strongest and what to check before starting.
- 02THE EMDR PROCESSHow does EMDR work and what happens in a session?→
A clear guide to the EMDR protocol, bilateral stimulation and what may happen before, during and after a session.
- 03STEP-BY-STEP PROTOCOLThe 8 phases of EMDR: what happens at each stage→
A step-by-step guide to the eight EMDR phases, from history and preparation through closure and reevaluation.
- 04EYE MOVEMENTS, TONES AND TAPPINGBilateral stimulation in EMDR: what it is and what we know→
How EMDR eye movements, tones and tapping are used, and what research does and does not establish about the mechanism.
- 05TREATMENT PLANNINGEMDR target memory: what it is and how it is chosen→
How an EMDR target memory is identified, which elements are assessed and why therapy cannot verify whether a memory is historically accurate.
- 06THEORY AND MECHANISMThe EMDR AIP model: what it explains and what it does not→
What the Adaptive Information Processing model is, how it guides EMDR and why a clinical theory is not a proven literal account of the brain.
Our editorial starting point
Individual guides add sources specific to each question. This selection shows bodies and publications used across the collection.
- World Health Organization · PTSD interventions for adults↗
- NICE NG116 · Post-traumatic stress disorder recommendations↗
- American Psychological Association · EMDR therapy↗
- American Psychological Association · What is EMDR therapy?↗
- American Psychological Association · Exploring the 8 phases of EMDR↗
- PubMed · Systematic review of proposed EMDR mechanisms↗
- PubMed · Meta-analysis of dual-task effects on emotional memories↗
- EMDRIA · Selecting the target memory↗
Questions to orient your next step
Is EMDR simply moving your eyes?
No. Eye movements are one possible form of bilateral stimulation within an eight-phase psychotherapy protocol that includes assessment, preparation, closure and reevaluation.
Is there a definitive explanation of how EMDR works?
There is no single mechanism that has been definitively established. Working memory, dual attention, learning, brief exposure and shared therapy factors are among the processes being studied.
Does every EMDR session process memories?
No. Sessions may focus on history, assessment, preparation, resources, planning, closure or review. Pacing depends on the situation and agreed treatment plan.