With industry backing, University of Memphis researcher seeks to improve new brain therapy

This article reports on research of Dr. Charles Blaha sponsored by Advanced Neuromodulation Systems Inc.  An interesting statement on DBS from the article:

But it's not a miracle cure. Blaha, a professor of psychology, is aware of the drawbacks: Like any brain surgery, deep brain stimulation can cause injury, and complications are not uncommon. A millimeter's difference in the placement of the electrode within the brain can determine if it's effective. And scientists still don't understand exactly why it works.

read the article here.