Electric Depression

NYT Saturday blog 3 of 3:

The pacemaker-like device, called a vagus nerve stimulator, is surgically implanted in the upper chest, and its wires are threaded into the neck, where it stimulates a nerve leading to the brain. It has been approved since 1997 for the treatment of some epilepsy patients, and the drug agency has told the manufacturer that it is now "approvable" for severe depression that is resistant to other treatment.

But in the only rigorously controlled trial so far in depressed patients, the stimulator was no more effective than surgery in which it was implanted but not turned on.

While some patients show significantly improved moods after having the $15,000 device implanted, most do not, the study found. And once the device is implanted, it is hard to remove entirely; surgeons say the wire leads are usually left inside the neck.

...
But Dr. Michael Thase, a psychiatrist at the University of Pittsburgh who consults for the company, said there was "simply not a good enough basis in evidence" for approval. While the device is promising, Dr. Thase said, "the shaky state of the evidence means we have to be very cautious with this and prepare for the possibility that the hoped-for benefit isn't there."

A "mood pacemaker." Who would have thought that psychoemotional aspects would be the next "Frontier" of cybernetics...?