The seat of overweening shame after posting a bad comment? The seat of self consciousness, the place where the pool shark chokes thinking about him and or herself doing the shot - and flubbing it as a result. Does it really serve a useful purpose, or is it just bad feedback, a whining shrill encumbrance? Or is the development of this neural capacity a sign of maturity?
The seat of shame? The lateral sulcus or insula is whorled into the brain as an especially deep convolution. According to neural imaging, that is the seat of the self, or at least the area that becomes most active during self-reflection.