For people who battle depression and can't find
relief, stimulating the brain with electric impulses
may help. But a new study by Brazilian researchers
says it's still no better than antidepressant
medication. In a trial that pitted transcranial,
direct-current stimulation against the
antidepressant escitalopram, the lead researcher
found that lessening of depression was about the
same for either treatment. The lead researcher found
that antidepressants are better than tDCS and should
be the treatment of choice. In circumstances that
antidepressant drugs cannot be used, tDCS can be
considered, as it was more effective than placebo.
The researchers used the Hamilton Depression Rating
Scale. This test has a score range of zero to 52,
with higher scores indicating more depression.
People who received brain stimulation lowered their
depression score by 9 points. Those taking Lexapro
had depression scores drop by 11 points. Patients
receiving placebo experienced a drop of 6 points in
their depression score, the lead researchers found.
To get a better idea of how well brain stimulation
worked for depression, the lead researcher randomly
assigned 245 patients suffering from depression to
one of four groups. One group had brain stimulation
plus a placebo pill, another had fake brain
stimulation plus Lexapro. The third group had brain
stimulation plus Lexapro, and the final group had
fake brain stimulation plus a placebo. Brain
stimulation involved wearing sponge-covered
electrodes on the head. The treatment was given for
15 consecutive days at 30 minutes each, then once a
week for seven weeks. Lexapro was taken daily for
three weeks, after which the daily dose was
increased from 10 milligrams (mg) to 20 mg for the
next seven weeks. After 10 weeks, patients receiving
brain stimulation fared no better than those taking
Lexapro. Patients receiving brain stimulation,
however, suffered from more side effects, the lead
researcher found. Specifically, patients receiving
brain stimulation had higher rates of skin redness,
ringing in the ears and nervousness than those
receiving fake brain stimulation. In addition, two
patients receiving brain stimulation developed new
cases of mania. That condition can include elevated
mood, inflated self-esteem, decreased need for
sleep, racing thoughts, difficulty maintaining
attention and excessive involvement in pleasurable
activities. Patients taking Lexapro reported more
frequent sleepiness and constipation. |