Fast Company  FDA Approves Magnetic Helmet For Treating
Depression  Today the United States Food and Drug Administration
approved a device that treats depression using... magnets. About
14.8 million American adults, or 6.7 percent of the U.S. adult
population, are diagnosed with major depression in a given year,
and antidepressant medications often don't help.  The
technology, known as deep Transcranial Magnetic Stimulation or
TMS, involves placing a helmet filled with electromagnetic coils
very close to the scalp and zapping them with pulses of
electricity, which causes neurons to fire in very specific areas
of the brain.  Or in plain English from the company's website:
"When the induced field is above a certain threshold, and is
directed in an appropriate orientation relative to the brain's
neuronal pathways, localized axonal depolarizations are
produced, thus activating the neurons in the relevant brain
structure."  Magnets, How Do They Work?  First the machine is
calibrated by placing it over a part of t