reported in New Scietist. "So the only thing that this study really tells us about 'the brain and violence' is that the same thing happens neurologically when one is faced with various simulated violent situations, where there's no real threat of harm and the subject is fully cognizant of his or her own fundamental safety."
Which seems a fair point. However it does point up the need to find a way to correlate imaginary violence with actual willngness to perpetrate, and that's yet another thing.
Video game violence and the brain: See also John Borland article