Heart Rate Variability Biofeedback Training in Psychogenic Disorders

Inclusion criteria: * Age 18 to 75 * Responding to somatoform disorder characteristics as described in ICD-10 (F45: "The onset of physical symptoms associated with an insistent medical quest, persisting despite repeated negative assessments and statements by physicians that the symptoms have no organic basis. If there is a genuine physical disorder, it does not account for the nature or severity of the symptoms, or the distress or concerns of the subject. The multidisciplinary team will determine whether or not the diagnosis of conversion disorder (disorder with functional neurological symptoms) of the DSMV (300.11) \[ICD-10 equivalent: F44.4 "dissociative disorder with abnormal movements"\] is associated with the diagnosis of conversion disorder (disorder with functional neurological symptoms) of the DSMV (300.11) \[ICD-10 equivalent: F44.4 "dissociative disorder with abnormal movements"\], selected by the multidisciplinary team after a phase 1 assessment. * Patient benefiting from a social security scheme Exclusion criteria: * Simulation identified with obvious search for secondary benefit according to the ICD-10 classification ( Z76.5 Simulator: Person pretending to be ill (with obvious motivation"), or DSM-V(V65.2) * Any other specific PAT-specific CEP (botulinum toxin, psychotherapy and/or relaxation provided by a professional (CBT, ACT, Mindfulness, etc.)) scheduled within 6 months, with the exception of the usual analgesics (Tier I or II)Presenting significant cognitive impairment (MoCa test ≤ 24/30), * Absence foreseeable at least 30% of the sessions, * Lack of informed consent. * Pregnancy or planned pregnancy during the study period, Pregnant or breastfeeding women * Major protected by law or patient under guardianship or curatorship * Participation in other ongoing research