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Zapping Those Voices in The Head


"Suppression of hallucination for months is fabulous and very interesting," Pascual-Leone says. "It is a very hard problem -- patients generally do not get very good responses even after long-term medication. To help with that aspect of the disease would be very helpful indeed."

Pascual-Leone, director of the Harvard laboratory of magnetic brain stimulation, notes that his group also is experimenting with rTMS as a treatment for schizophrenia. He says that one problem he has encountered is that when the effects of treatment wear off, some patients have worse symptoms than they did before undergoing the experimental therapy.

This rebound effect has not occurred in patients treated with rTMS for depression in studies under way at Emory University, according to William McDonald, MD, director of the Fuqua center for late-life depression. "The biggest concern is that it can cause seizures, so people are excluded from our studies if they have a history of seizures," he tells WebMD. "There is no apparent downside. There are no memory deficits, which gives rTMS an advantage over ECT."

Hoffman says he has undergone rTMS so that he could personally evaluate the effects. "It doesn't exactly feel like a shock but it feels weird, like a tingling sensation, kind of like a woodpecker tapping on the skull," he says. "It also causes a contraction of the scalp or face, and may produce other contractions. It feels odd, but by and large the patients tolerate it very well. But we have a selected group of patients who volunteer for this. They are pretty desperate, and their families are desperate."

One fear Hoffman was worried about was whether paranoid patients with a delusional fear that people were trying to control their brains would object to the use of electromagnetic waves to -- well, to control their brains. "It's something we are concerned about, but the patients have actually been reasonable," he says. "It is more acceptable to deal with someone actually trying to control their brain than their fears about it."


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