Implanted Brain 'Pacemaker' Treats Depression
Patients Improved With Experimental Implant After Antidepressants Failed
WebMD News Archive
How It's Done continued...
All six of the patients reported improvement soon after the surgery. Two of
the six became depressed again within six months.
The four other patients had few
after surgery, and all still have the implants. Imaging studies revealed brain
changes consistent with a return to normal Cg25 activity. These changes have
also been seen in depressed patients who respond well to drug treatment.
The findings are reported in the March 3 issue of the journal
Mayberg says the findings could represent the first step in a paradigm shift
in the thinking about depression. Drug treatments target chemical imbalances
within the brain. But the early research indicates that for some patients
successful treatment will require "rewiring" parts of the brain's
"This study tells us that this strategy has real potential … that our
first target [within the brain] looks like it was a good selection," she
says. "It may be that there are other areas of the brain that are better,
but that remains to be determined."
Return to Normal
One of the big advantages of the brain pacemaker is that the electrical
impulses can be adjusted in patients who don't respond as hoped. Debbie says it
took about a year of tweaking, but she now feels "perfectly normal" for
the first time in almost a decade.
Unable to do much more than stare out her bedroom window for hours at a time
before the surgery, she is now planning to open her own business.
"Unlike the drugs that have failed me, I feel like if, God forbid, this
stops working they can make adjustments to get me back on the right track,"
All agree that more study is needed to confirm the findings, and that, as
with Parkinson's disease, only the sickest patients who don't respond to other
treatments would be candidates for the procedure.
"Even brain surgery that is relatively benign, as this is, is a serious
procedure," Mayberg says.
"You don't operate on someone's brain if there are other reasonable
treatment options. But this is also a serious disease that leaves people
morbidly sick for long periods of time. When you see these people living normal
lives the way other people do, it is both sobering and humbling," she