Findings

• what are the lobes of the cortex?

  frontal lobe

  parietal lobe

  temporal lobe

  occipital lobe
• what were the differences in the frontal lobe?

  NGRI had lower activity - link to impulse control and immaturity
• what were the differences in the parietal lobe?


  NGRI had lower activity especially in left angular gyrus - link to poor verbal skills
• what were the differences in the temporal lobe?

  no difference
• what were the differences in the occipital lobe?

  NGRI had higher activity
• what were the areas that showed differences in the sub-cortex?

  corpus callosum

  hippocampus, amygdala, thalamus

  cerebellum
• what was the difference in the corpus callosum?

  NGRI had lower activity - link to a predisposition to violence
• what were the differences in the hippocampus, amygdala and thalamus?

  NGRI had lower activity in left hemisphere, higher activity in right hemisphere
• what was the difference in the cerebellum?

  NGRI had higher activity
• performance on the CPT

  both groups performed similarly on CPT = any observed brain difference were not related to task performance
• what were the other differences not controlled?

  head injury

  ethnicity
• how many had head injury?

  23, but didn't differ from murderers without
• how many had different ethnicity?

  14 of murderers non-white, in comparison to white, murderers showed no significant difference in brain activity