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    Magnetic Pulses May 'Zap' Migraine Pain

    Study Shows Portable Device Can Zap Migraine Headache Pain
    By
    WebMD Health News

    June 27, 2008 -- A lightweight, handheld device helps migraine sufferers zap away pain, sometimes within two hours, according to a new study.

    Called a transcranial magnetic stimulation device (TMS), it transmits magnetic pulses that interrupt the "hyper-excitability" of neurons in the brain, which some experts believe is to blame for launching the migraine.

    "This is based on a new understanding of how migraines start," says Yousef Mohammad, MD, a professor of neurology and principal investigator of the study at Ohio State University Medical Center, Columbus. The findings will be presented this week at the annual meeting of the American Headache Society in Boston.

    About 35 million Americans suffer from migraines, according to the American Headache Society.

    Migraine Zapper vs. 'Sham' Treatment

    Mohammad and his colleagues randomly assigned 201 migraine sufferers, ages 18 to 68, to a treatment group or a sham treatment group at 16 different study centers.

    Members of both groups took home the device, which is now portable and weighs about 3 pounds. It looks like a box with two handles on either side.

    Participants didn't know if they had the device that emitted magnetic pulses or the devices that looked identical and buzzed and vibrated like the real machine but did not emit the pulses.

    All had been diagnosed with migraine with aura -- the changes in vision and light sensitivity and other symptoms that about one in five migraine patients experience before the headache pain. They had a history of one to eight migraines with aura per month. To enter the study, they couldn't overuse headache medicines.

    When they noticed the aura coming on, they were told to grasp the handles and apply the device to the back of their heads, then to administer two pulses by pushing a button twice.

    They recorded their responses and pain levels in an electronic diary when they treated themselves and again at 30 minutes, one hour, two hours, 24 hours, and 48 hours later. A total of 164 patients finished the study, recording their responses for up to three attacks over three months.

    At the two-hour mark, 39% of the patients who used the real machine were pain free, compared with just 22% using the sham treatment device. The difference is very significant, Mohammad tells WebMD.

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