findings

• the 41 murderers had significantly lower glucose metabolism in the prefrontal cortex, left angular gyrus and corpus callosum than the control group.
• murderers were identical to controls on temporal lobe glucose metabolism, but significantly higher in the occipital lobe.
• NGRI participants showed an abnormal symmetry of activity with reduced left hemisphere and increased right activity in the amygdala and hippocampus.
• no significant difference in the amount of midbrain and cerebellum activity between murderers and controls.
• the group did not differ on any behavioural performance on the CPT.
• there was no significant difference between the 14 non-white murderers and the white murderers, or between the 23 murderers with a head injury and those without.