brain
How was Phineas Gage's brain damaged?
an iron rod that shot through his skull and obliterated the greater part of the left frontal lobe of his brain.
Why is Phineas Gage's story important to neuroscientists today?
It was perhaps the first case to suggest the role of brain areas in determining personality and which specific parts of the brain, when affected, can induce specific mental changes.
How did he act before the accident?
Before the accident he had been their most capable and efficient foreman, one with a well-balanced mind, and who was looked on as a shrewd smart business man.
How did he act after the accident?
He became irritable, temperamental, and exhibited a marked decline in his work ethic.
How do neuroscientists today determine the exact damage done to Gage's brain?
Examining the damage done to the skull.