This article is from 2006 and I was ready to rush right out and volunteer for their study. They’ve found that pacemakers can help Parkinson patients and also depressed patients. It will be ungodly expensive if it becomes the norm I’d assume, since they insert electrodes deep in the brain.
There is another surgery done in my city where they attach electrodes to the vagus nerve and it works the same way. Much cheaper and done on an outpatient basis. Apparently one of the weird side effects will be a squeak or something if you’re talking while the zap happens. When nothing else has worked these seem like good options to look into. But not for me at the moment. I’m not feeling THAT bad and after two brain surgeries in recent years I have an aversion to doctors and hospitals.