What does the case of Phineas Gage suggest about traumatic brain injury?

What will be an ideal response?

Gage survived a blasting accident in which an iron bar went through his brain.
He had a severe frontal lobe wound that altered his personality. Where once he was efficient and capable he became impulsive and profane. This illustrates a neuropsychological personality syndrome and is characteristic of frontal lobe damage. Further, Gage was no longer able to return to his former occupation, a common outcome of this kind of brain injury.