From the World Science Festival in May 2015, this panel discussion centred on what is known about treating the brain, and the ethical and legal complications of brain enhancement.
The moderator is Richard Besser (Physician, Journalist), and participants include Nita A. Farahany (Bioethicist, Law Professor), Richard Haier (Neuroscientist), Blanca Li (Choreographer, Filmmaker), and Michael Weisend (Neuroscientist)
http://www.worldsciencefestival.com/programs/spark-genius-electrical-stimulation-brain/