Transcranial Electric Stimulation Therapy (TEST) for Treatment Resistant Depression (TRD)

TMS measurements of cortical excitability pre and post study intervention

The Thymatron(R) System IV (Somatics LLC, Venice, FL, USA) is an FDA 510(k)-cleared ECT device. For TESt, we will be using it in a non FDA-approved manner--stimulating without intending to induce seizures.

Conventional MRI studies in this protocol are considered non-significant risk (NSR) devices. While operated in research mode, the MRI will be under the International Electrotechnical Commission (IEC) 60601-2-33 First Level Controlled Operating Mode, which allows for research pulse sequences to be used within the FDA/IEC safety limits for MRI devices.

Anesthesia alone