Repetitive Transcranial Magnetic Stimulation of the DMPFC for Anorexia and Bulimia: an Open-Label Case Series

University Health Network, Toronto

Status and phase: Completed; Phase 1

Conditions: Bulimia Nervosa; Anorexia Nervosa

Treatments: Device: Repetitive Transcranial Magnetic Stimulation

Study type: Interventional

Funder types: Other

Identifiers

NCT04409704

11-0771

Details and patient eligibility

About

This project proposes to perform a pilot study of fMRI targeted Dorsomedial Prefrontal Cortex repetitive transcranial magnetic stimulation (DMPFC-rTMS) on individuals diagnosed with Bulimia Nervosa (BN) and Anorexia Nervosa (AN). The DMFPC is a novel target for rTMS, is heavily implicated in the regulation of mood and affect, and has been suggested to be involved in AN, BN, major depression, OCD, and PTSD. Improved function in this area might lead to reduced AN and BN symptoms, such as bingeing, purging, and over-activity, perhaps by improved regulation of mood and affect. Improvements in important areas of comorbidity might allow for better response to intensive treatment for AN and BN, and reduce relapse rates after such treatment. The DMPFC may be a more appropriate target for compared to the Dorsolateral Prefrontal Cortex (DLPFC), which has typically been the focus of stimulation in the past. Our initial preliminary pilot work has noted unexpected and significant improvements in some core ED symptoms (bingeing and purging) and in important areas of comorbidity (OCD and PTSD), along with expected improvements in mood. These changes have allowed some treatment resistant patients to either complete intensive treatment or be successful in maintaining their progress post intensive treatment. Subjects will receive up to 30 sessions of bilateral DMPFC-rTMS. Response will be evaluated clinically, via psychometric measures, and pre and post fMRI.

Enrollment: 60 patients

Sex: All

Ages: 18 to 65 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

Patients will be included if they:

• Are voluntary and competent to consent to treatment.
• Have met DSM-5 diagnostic criteria for Anorexia Nervosa or Bulimia Nervosa, over the last 6 months at minimum

Exclusion criteria

Patients will be excluded if they have:

1. Past or current neurological illness
2. Comorbid schizophrenia
3. Current suicidal intent or plan
4. Contraindications to MRI or rTMS (e.g., metallic implants/foreign bodies)
5. Pregnancy.

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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60 participants in 1 patient group

10 Hz

Experimental group

Description:

10 Hz repetitive transcranial magnetic stimulation to dorsomedial prefrontal cortex, once daily, 5 days per week for 4-6 weeks

Treatment:

Device: Repetitive Transcranial Magnetic Stimulation