Cerebral and Cognitive Markers of Treatment Resistance in Obsessive Compulsive Disorder

Who May Qualify: - Obsessive compulsive disorder diagnosed according to Diagnostic and Statistical Manual 5 criteria (patients will be included regardless of the severity and resistance of their pathology and their levels of executive functions) - Understand and accept the constraints of the study - Be a beneficiary or affiliated to a Health Insurance scheme Who Should NOT Join This Trial: - Present one of the diagnoses according to the criteria of the DSM 5: schizophrenic disorders, substance abuse or dependence to a substance according to the criteria of the M.I.N.I. version 5.0 (Sheehan et al., 1998) - Generalized anxiety disorder, social anxiety, nicotine dependence and history of a major depressive episode are not exclusion criteria according to the M.I.N.I. version 5.0 (Sheehan et al., 1998) - Have a serious intercurrent pathology - Being a pregnant woman - Being a woman of childbearing age without effective contraception. - Being hospitalized under duress or on an outpatient basis in a care program - Being under judicial protection (reinforced curatorship, guardianship) Always talk to your doctor about whether this trial is right for you.