"Deep brain stimulation - which is thought to inactivate the lateral 
habenula - has been reported to improve depressive symptoms in 
humans. But our findings suggest these improvements may not be 
because patients feel happier. They may simply no longer care as much 
about what is making them feel depressed."

(I wonder if the not caring effect also would apply to the results of 
electric shock to the brain.  S.)

http://www.medicalnewstoday.com/articles/269291.php


"People Who experience mood swings, fear, voices and visions"