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Butler Hospital
Butler Hospital

How Does TMS Work

TMS is non-invasive; it does not involve surgery, insertion of intravenous lines or anything else put into your body. It also does not require any anesthesia or sedation. TMS uses a small electromagnetic coil controlled by a computer program to deliver short, powerful bursts of magnetic energy focused precisely on the left side of the brain’s frontal cortex. The TMS magnetic fields are the same type and strength as those produced by a magnetic resonance imaging (MRI) machine.

A treatment coil is applied to the head above the targeted area of the brain, called the prefrontal cortex. This part of the brain is involved with mood regulation. TMS magnetic fields do not directly affect the whole brain; they only reach about 2-3 centimeters into the brain directly beneath the treatment coil. As TMS magnetic fields move into the brain, they produce very small electrical currents. The electrical currents activate cells within the brain, which are thought to release neurotransmitters.

The typical initial treatment course consists of 5 treatments per week over a 4-6 week period, for an average of 20-30 total treatments. Additional treatments may be used to maintain optimal antidepressant benefits, but a frequency schedule for “maintenance” TMS treatments has not yet been established. Each treatment session lasts about an hour.

Results of Clinical Trials of TMS

The type of TMS machine used at Butler Hospital was determined by the FDA to provide safe and well- tolerated treatment for depression. The data collected in these clinical trials resulted in FDA clearance “for the treatment of Major Depressive Disorder in adult patients who have failed to achieve satisfactory improvement from one prior antidepressant medication at or above the minimal effective dose and duration in the current episode."

In an open label trial, approximately 1 out of 2 patients treated with the TMS Therapy device used at Butler Hospital experienced significant improvement in depression symptoms. TMS treated patients also experienced significant improvement in anxiety, appetite changes, aches and pains, and lack of energy associated with depression.

Approximately 1 out of 3 patients treated with TMS Therapy experienced complete symptom relief at the end of six weeks.

Back to Transcranial Magnetic Stimulation (TMS)

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