Binge Eating Disorder and Obesity : Functional MRI Study

Inclusion Criteria: * Non specific inclusion criteria * Age limits ≥ 12 et \< 16 years * Collection of the informed consent. For the minor patients, signature of parents * Affiliation or recipient with the mode of social security. * No associated evolutionary pathologies * Specific inclusion criteria for the patients * Existence of a current food disorder of the conducts of type binge eating disorder according to the criteria Marcus and Kalarchian * Diagnosis of obesity defined by a body mass index \> 97th percentile * Severity criteria defined by: Evolution of the obesity and the BED for at least 5 years AND Not answer to a dietary, pharmacological, psychotherapeutic care during at least 6 months * Specific inclusion criteria for the volunteers * Absence of a current food disorder of the conducts of type binge eating disorder according to the criteria Marcus and Kalarchian * Absence of antecedent of neurological disorder * an actual body mass index \< 90th percentile Exclusion Criteria: * IRM contraindication * Pacemaker * Port(Bearing) of surgical clips in the cervico-cephalic region or implanted medical surgical material(equipment) susceptible to mobilize under the influence of magnetic gradients * Intraocular foreign body * Metalic foreign body * claustrophobia * The existence of possible psychiatric histories will be individually estimated * Pregnancy and breastfeeding * Loss of liberty by court or administrative order