Cerebral and Cognitive Markers of Treatment Resistance in Obsessive Compulsive Disorder

Inclusion Criteria: * 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 Exclusion Criteria: * 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)