Findings and conclusions

• Frontal cortex 


  • Ngri had less activity than the control group
  • linked to impulse control and immaturity
• Parietal cortex 


  • NGRI had less activity especially in the left angular gurus
  • linked to poor verbal skills
• Temporal cortex 


  No difference between both groups
• Occipital cortex 


  NGRI had more activity
• Cerebellum 


  NGRI had more activity than other groups
• Less activity 


  Reduced glucose metabolism in some areas, notably those linked to violence
• Abnormal asymmetries - reduced activity on the left side of the brain greater than the right
• Performance of the CPT


  Both groups performed similarly in the tasks - any observed differences were not a result of the task performance
• Identifiable links between areas of the brain and aggression - provide preliminary evidence that murderers NGRI have different brain function to normal individuals
• No cause and effect relationship - unreliable