My answer to How do hard experiences cause permanent positive personality changes?
Answer by Connie b. Dellobuono:
Prefrontal cortex contains our ability to be ourselves. It is affected by our experience and past history that can make us persevere more or lack of perseverance, focus or be distracted easy and have good or bad/short attention span.
Our past experience is embedded in our Prefrontal cortex that will motivate or demotivate us.