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This is a study to assess the effectiveness of repetitive transcranial magnetic stimulation (rTMS) as a treatment for depressed adults with bipolar disorder.
In rTMS high-intensity, fluctuating magnetic fields non-invasively stimulate the cortex of the brain depolarising neurons. No anaesthetic is required and the treatment in subconvulsive. Recent studies suggest that rTMS can be an effective treatment for depressive illness in adults (Loo and Mitchell et al, 2005) and appears to be quite safe.
Most of the published studies to date have focused on unipolar depression. There is limited data of TMS use in bipolar depression. Eg. Pilot study by Nahas Z, Kozel FA, Li X, Anderson B, George MS.in 2003, which was negative.
The investigators wish to assess this in a sham-controlled study of adults. The investigators hypothesise that both left and right sided rTMS will have an antidepressant effect superior to sham in this population.
Inpatients and outpatients with major depressive episodes as part of either bipolar I or II illness will be eligible. In the event that patients (in any arm) have no significant response after a defined period, they will shift to an open phase where they will receive left prefrontal 10Hz stimulation. Thus all participants will have the opportunity to receive active treatment.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double-Blind, Primary Purpose: Treatment
Transcranial Magnetic Stimulation
Black Dog Research Institute
New South Wales
The University of New South Wales
Published on BioPortfolio: 2014-08-27T03:38:41-0400
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The electrical response evoked in a muscle or motor nerve by electrical or magnetic stimulation. Common methods of stimulation are by transcranial electrical and TRANSCRANIAL MAGNETIC STIMULATION. It is often used for monitoring during neurosurgery.
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A technique that involves the use of electrical coils on the head to generate a brief magnetic field which reaches the CEREBRAL CORTEX. It is coupled with ELECTROMYOGRAPHY response detection to assess cortical excitability by the threshold required to induce MOTOR EVOKED POTENTIALS. This method is also used for BRAIN MAPPING, to study NEUROPHYSIOLOGY, and as a substitute for ELECTROCONVULSIVE THERAPY for treating DEPRESSION. Induction of SEIZURES limits its clinical usage.
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