What happened to Phineas?
After a heavy metal rod was blown through his temporal lobe, Phineas experienced dramatic mental change, which was similar to adolescent behavior. The study of trauma and its physiological effects provided the first documented evidence of how brain injury can affect human behavior.
How did this change his behavior?
Phinaes's behavior was similar to an adolescent's because he exhibits impulsivity, emotional instability, and a lack of decision-making skills. These are all common traits among adolescents, who are still developing their brains and learning how to regulate their emotions and make sound decisions.
Additionally, Phineas also exhibited a desire for independence and a tendency to engage in risky behaviors, which are also common among adolescents. Overall, Phinaes's behavior reflects the typical developmental stage of adolescence.