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Smoking Cessation Health Center

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Magnetic Brain Stimulation May Help Smokers Quit

Study of experimental treatment shows some success at six months

WebMD News from HealthDay

By Steven Reinberg

HealthDay Reporter

TUESDAY, Nov. 12 (HealthDay News) -- When willpower doesn't work, smokers who want to quit may have a new tool someday: magnetic brain stimulation.

A study of 115 smokers found that 13 sessions of the treatment over three weeks helped some heavy smokers quit for as long as six months.

This noninvasive technique, called repeated high-frequency transcranial magnetic stimulation, sends electric impulses to the brain. It is sometimes used to treat depression.

"Using noninvasive stimulation can reduce nicotine craving and smoking," said lead researcher Abraham Zangen, an associate professor at Ben-Gurion University of the Negev in Beer-Sheva.

"If you stimulate regions in the brain that are associated with craving for drugs, you can change the circuitry in the brain that mediates this dependence and eventually reduce smoking," he said. "And many of those treated stop smoking."

The study participants smoked at least a pack a day and had failed at least two previous attempts to quit, said Zangen, who has a financial interest in the equipment used in the study.

The researchers divided the participants into three groups. One group received high-frequency brain stimulation, another low-frequency stimulation, and the third received a phony treatment. The groups were further divided into those who saw a visual cue -- a picture of a lit cigarette -- just before stimulation and those who didn't.

The idea of the cue is to make sure attention is directed at smoking and not some other craving, Zangen said.

After 13 treatments, those who received the highest level of stimulation plus the visual cue had the best results -- 44 percent of them had quit. After six months, one-third of this group were still not smoking compared to 28 percent of those who weren't shown the visual cue before treatment.

The results of the study were scheduled for presentation Tuesday at the annual meeting of the Society for Neuroscience in San Diego.

Although magnetic brain stimulation is approved by the U.S. Food and Drug Administration for treating depression, it is not yet approved for helping people quit smoking, Zangen said.

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