Surgery
The U.S. Food and Drug Administration has
approved the vagus nerve stimulator (VNS) implant for treatment of
depression. This device is used when other treatments
for depression have not worked.
A generator the size of a pocket
watch is placed in the chest. Wires go up the neck from the generator to the
vagus nerve. The generator sends tiny electric shocks through the vagus nerve
to that part of the brain that is believed to play a role in mood.
How well the VNS implant works has not been well studied and the device
is expensive.13