 Within the treatment sessions patients will be exposed to EMDR with eye movements Condition 1, C1 and EMDR without eye movements Condition 2, C2 conducted by the EMDR accredited therapist. Patients will be randomly allocated into either C1 or C2 for his or her first session. Session one and session two will be no more than two weeks apart with each session lasting approximately one hour. At the beginning of each session patients will be required to attach the small infrared transmittance heart rate sensor HeartMath to their index finger, which will digitally record their arousal levels and transfer the responses to the laptop. Their face will also be video recorded during the entire session by a small camera on a laptop located approximately three feet across from them. The purpose of this is to be able to match the time of when specific EMDR phases were administrated the eye movements, to the same time of the patients HRV response. Although faces will be recorded throughout the entire session, only certain stages of the eight stage therapy protocol will be analysed. A five minute adaptation period will be given to all individuals. During both treatment sessions the therapist will use a chosen life event to use within the EMDR protocol. Where possible, the clinician will seek to ensure that each patient will complete the full eight stage protocol as outlined by Shapiro 1989 Appendix 1. Each individual will also score the vividness scale before and after each condition is completed. A self measure of distress level known as subjective units of distress SUD are also obtained throughout each session as part of standard EMDR protocol, requiring the patient to rate their level of distress on a scale of 1 to 10. 