Efficacy of Dorso-lateral Prefrontal Cortex Stimulation by tDCS in Motor Conversion Disorder Patients

Inclusion Criteria: * The patient must have given his/her informed and signed consent. * The patient is at least (≥) 18 years old and 65 years old at the most (≤). The risk of an increased frequency of somatic comorbidity, drug co-prescription, and cognitive impairment prompts us to limit recruitment to age 65 in this study. * The patient is hospitalized or followed in consultation. * Patient is available for a follow-up of 6 months. * With current DSM-5 criteria for conversion disorder during more than 10 days, motor type (i.e. with paralysis or motor weakness) and initial EDSS score ≥ 3 or initial WHO Score is ≥ 2 Exclusion Criteria: * The patient is participating in another interventional trial. * The patient refuses to sign the consent. * It is impossible to correctly inform the patient. * The patient is pregnant or breastfeeding. * Specialized neurological clinical examination and the performing of brain and medullary MRI reveal an organic neurological involvement. * Current episode of mania, hypomania, diagnosis of substance abuse/dependence (excluding smoking), diagnosis of schizophrenia over lifetime, severe neurological pathology (epilepsy, stroke, brain tumor). * Patient with a contraindication to MRI (for patients enrolled in Nîmes). * Acute eczema at the electrodes loci.