When violent video games are played, they can create specialized killing centers in the brain (e.g., the brain devotes special circuits/dedicated networks to the game).(Quartz, Steven R., PhD, and Terrence J. Sejnowski, PhD. Liars, Lovers, and Heroes, p. 212. NY: HarperCollins Publishers Inc., 2002.)
Viewing violent images (e.g., TV, movies, videos) can activate the prefrontal cortex. The orbitofrontal cortex is in intimate contact with the emotional centers in the amygdalae and other limbic system components. Adolescents and young adults who watched more than seven hours of television per week were more likely to commit an aggressive or violent act in later years. Viewing violent images (e.g., TV, movies, videos) can activate the orbitofrontal cortex, and increase the risk of an acute attack of disabling symptoms in children and adults who suffer from mental illness. Constant exposure to visual depictions of conflict, violence, and suffering can create dysfunctional circuits in brain areas that mediate emotion. Results may include PTSD. (Restak, Richard, MD. The New Brain, p. 68-79, 82-83. PA: Rodale, 2003.)
Refer to Trauma – Violence and the Brain for additional information.