Stress and Neurofeedback in Anorexia Nervosa

Inclusion Criteria: Healthy Controls (HC) * Individuals aged 18-45 years * Healthy body weight between 90 and 110 % average body weight since puberty. * Regular monthly menstrual cycle (if applicable) * Edinburgh Handedness Inventory Revised (EHI-R) LQ\* score \> +200 * All ethnic backgrounds * English is primary language spoken Anorexia Nervosa (AN) * Age 18-45 years old * Edinburgh Handedness Inventory Revised (EHI-R) LQ\* score \> +200 * All ethnic backgrounds * Current diagnosis of anorexia nervosa, including being underweight, will have a severe fear of weight gain, body image distortion and absence of the menstrual cycle over three consecutive months. * English is primary language spoken Atypical Anorexia Nervosa (AAN) * Age 18-45 years old * Edinburgh Handedness Inventory Revised (EHI-R) LQ\* score \> +200 * All ethnic backgrounds * Meets the criteria for anorexia nervosa except despite significant weight loss, the individual's weight is within or above the normal range * English is primary language spoken Exclusion Criteria: Healthy Controls (HC) * Current pregnancy or breast feeding within last 3 months * First degree relative with current or past eating disorder * Psychiatric Medication use such as selective serotonin reuptake inhibitors (SSRIs), atypical antipsychotics, etc. * Past or present Axis I psychiatric disorder including substance or alcohol use disorder as determined through structured clinical interview * History of significant head trauma * Ind…