So stuttering is an effect of (over) activity in the brain, more precisely the default-mode-network, which is among other things responsible for (self) awarenes

So stuttering is an effect of (over) activity in the brain, more precisely the default-mode-network, which is among other things responsible for (self) awareness. That sure explains a lot, I used to stutter a lot and be preoccupied with it, now I hardly stutter and don't think about it at all. Also funny they mention, en passant, in-breading in Pakistan. Wanna study rare genetic effect? Just go to the place with excess gene-expression.