Based on the concept of traumatic event, the model of the adaptive information processing is described to illustrate how EMDR is applied to reprocess the trauma and resolve post-traumatic psychopathology. The eight phases of the EMDR treatment are presented together with the way an EMDR session is conducted and the contribution and innovation that EMDR represents in the field of therapy of post-traumatic states and its applicability in other symptomatic conditions.< span class="text23">