The more adolescent boys absorb violence in media such as movies, television shows and video games, the less sensitive certain areas of their brains become to these images, researchers report.
"There are always going to be people who are violent no matter what they're exposed to," said study senior author Jordan Grafman. "What's even more dangerous is when society accepts such behaviours. . . If something becomes acceptable, then those who are creating the violence and aggressive behaviour are allowed to get away with it more because society is not going to police it as much."
How the mechanisms play out in brain