Answer:
Damage to the front association area will likely result in a personality change or disorder.
How might frontal lobe brain damage affect someone's behavior?
It depends on the side of the brain that was engaged and the dominant side of the individual. Having said that, the majority of frontal lobe injuries are caused by traumatic brain injury, with vehicle accidents being the main culprit. Traumatic brain injury often causes trauma to the entire brain, on both sides. If you want to witness a "pure" frontal lobe trauma, you should look at persons who have had a tumor in the frontal lobe or a stroke in the area (which is less common than in other places). Since the frontal lobe is often in charge of the brain's "executive" or higher processes, organizing, planning, making decisions, and impulse control would all be impaired.