(January 27, 2007)--A federal health advisory panel has concluded that a machine designed to treat depression by zapping the brain with magnetic pulses shows no clear evidence of working.

The device, called the Neurostar TMS system, is manufactured by Neuronetics.

It uses magnetic energy to induce electrical currents in the region of the brain associated with mood.

The Pennsylvania company, which is seeking clearance from the Food and Drug Administration to market the machine, believes the currents stimulate neurons in the region and relieve the symptoms of depression.

Although, the FDA isn't required to follow the advice of its outside experts, it usually does.

According to an FDA spokeswoman, panelists say there was some suggestion the Neurostar works, but they called the effect marginal, borderline and questionable.

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