Non-invasive Intermittent Theta Burst Stimulation of the Dorsolateral Prefrontal Cortex in Patients With Functional Movement Disorders

Detailed Summary

Background: Functional movement disorder (FMD) causes involuntary movements, such as spasms, shaking, or jerks. These symptoms are not due to a recognized neurological or medical cause. Researchers want to better understand how the brain works to cause these symptoms. Objective: To test if intermittent theta burst stimulation (iTBS) affects brain areas involved in FMD symptoms. Also, to look at the effect of iTBS on mood and motor symptoms. Eligibility: Right-handed people ages 18-65 who have FMD and participated in protocol 07-N-0190 Design: Participants will have 4 visits. In Visit 1, participants will be screened with: Medical history Physical exam Urine test Questionnaires Visit 1 might also include a brain MRI and functional MRI. The MRI scanner is a cylinder surrounded by a strong magnetic field. They will lie on a table that can slide in and out of the cylinder. For the functional MRI, they will be asked to perform tasks during the MRI scan. Visit 2 will be 1-2 weeks after Visit 1. Visits 2, 3, and 4 will be no more than 48 hours apart. These include: Electromyography: Small electrodes are taped to the skin. Muscle activity is recorded while participants receive magnetic stimulation of the brain. Transcranial magnetic stimulation and iTBS: A wire coil is held on the scalp. A brief electrical current passes through the coil and creates a magnetic pulse to stimulate the brain. During iTBS, participants will sit quietly and watch a nature documentary. They will wear earplugs and a cap. MRI Functional MRI Questionnaires

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