Eye Movement Desensitization and Reprocessing (EMDR) was originally developed to treat traumatic memories. This procedure includes imagination exposure, cognitive reprocessing and bilateral stimulation initially decided by considering induced eye movements. The procedure consists of eight phases, looking for desensitization of the emotional impact and cognitive reprocessing of disturbing memories and thoughts developed after trauma. Although there are many studies supporting its effectiveness, very little is known about the underlying mechanisms. EMDR is one of the techniques recognized by the American Psychological Association (APA) as effective for treating posttraumatic stress disorder (PTSD) and some studies have proved its effectiveness in the treatment of other mental health problems.