Thanks for posting this Chemar.
It's a little hard for me to digest at 5 in the morning, but I picked up on a couple of things that concern me about the study.
One is that they only studied 15 adolescents.
Two is that they were instructed to "remain still" (suppress tics at rest) during the procedure. I would have thought that would negate the whole purpose of the study
http://www.cell.com/current-biology/...822(14)01051-3
Increased GABA Contributes to Enhanced Control over Motor Excitability in Tourette Syndrome
Amelia Draper, Mary C. Stephenson, Georgina M. Jackson, Sophia Pépés, Paul S. Morgan, Peter G. Morris, Stephen R. Jackson
Much of the technical aspects are very difficult for me to understand. I'll revisit after caffeine.

That probably won't help either.