Brain Mechanisms
Here et al. (2009)[1] found that there is corrolation between self-control and activirty in the dlPFC and vmPFC. As you practice on self control, there is more blod flow in the dlPFC. It seams that "evidences between the options will be stored in the dlPFC and when a trashold is passed in the vmPFC, the decision will be made.
It may be that people with more self-control, can withold verdict untill enough evidences are brghout.
The ACC is thought to be part of the conflict detection system between two deductions.