Hi I wanted to share a link that is in the T.N. forum here about neuro stim implant... it is used for O.N. and others on the thread have had the stim implant done for t.n. .. o.n. and other forms of neuralgias etc..it is a long read but some good first hand accounts and info...
here is the link

http://neurotalk.psychcentral.com/thread124048.html

PEACE
BMW