EMDR activates a natural healing mechanism in the body. The procedure imitates the rapid eye movements all people make during dream periods of sleep. Moving your eyes left and right, listening to tones that sound alternately in each ear or alternately tapping your hands or knees, stimulates the left and right hemispheres in the brain. This activity allows you to process information that has been blocked. EMDR alleviates emotional distress and heals traumatic experiences and memories.