Eye Movement Desensitization and Reprocessing (EMDR) therapy (Shapiro, 2001) was initially developed in 1987 for the treatment of post-traumatic stress disorder (PTSD) and is guided by the Adaptive Information Processing model (Shapiro 2007). EMDR is an individual therapy typically delivered one to two times per week for a total of 6-12 sessions, although some people benefit from fewer sessions. Sessions can be conducted on consecutive days.

The Adaptive Information Processing model considers symptoms of PTSD and other disorders (unless physically or chemically based) to result from past disturbing experiences that continue to cause distress because the memory was not adequately processed. These unprocessed memories are understood to contain the emotions, thoughts, beliefs and physical sensations that occurred at the time of the event. When the memories are triggered these stored disturbing elements are experienced and cause the symptoms of PTSD and/or other disorders.  

Unlike other treatments that focus on directly altering the emotions, thoughts and responses resulting from traumatic experiences, EMDR therapy focuses directly on the memory and is intended to change how the memory is stored in the brain, thus reducing and eliminating the problematic symptoms. 

During EMDR therapy, clinical observations suggest that an accelerated learning process is stimulated by EMDR’s standardized procedures, which incorporate the use of eye movements and other forms of rhythmic left-right (bilateral) stimulation (e.g., tones or taps). While clients briefly focus on the trauma memory and simultaneously experience bilateral stimulation (BLS), the vividness and emotion of the memory are reduced.