In rare cases, traumatic brain injuries can cause FAS, or foreign-accent syndrome.
This results in a patient's native speech taking on entirely new tone, or accent.
2016
Scientists Scanned the Brains of Bullies and Found they are Physically Small.
People who exhibited anti-social behavior as teenagers but not as adults showed no such abnormalities. Good news for reformed bullies, bad news for lifers.
2020
