Raine Et Al Study Flashcards
Pre frontal cortex
Predict action consequences, manage emo reactions, coordinate and adj complex behaviours
Amygdala
Process emo regulation, motivation,fear and how an organism responds to threats and challenges
Hippocampus
Control new STM memories
Angular gyrus
Astd w memory,Lang processing, spatial cog, attention
Thalamus
Pass info to app areas of cerebral cortex and plays a role in sleeping
Corpus callousum
Connect left and right cerebral cortex
Aim
Whether ppt pleading NGRi would show brain dysfunctions in areas brain astd w violence.
P
41 NGRI murderers
The ppts had not taken any drugs 2weeks prior conf by urine test.
Ensure no drugs affectingbbrain activities
Controls: 41 age, ethnicity, sex, schizophrenia
Procedure
radioactive tracer injection
tracer chem lights areas of 🧠 undergoing metabolism
-32 min after tracer, series of tasks on a computer
purpose activate areas in brain researchers intrested
-Immediately PET scan , 10 images brain at 10mm intv
Findings
Less activity in lateral prefrontal,medial pre, corpus callosum, parietal
High activation in right thalamus
More activity in right amygdala and hippocampus
C
NGRi diff brain activities than not violent offenders
Various areas interact= violent behaviour linked SEP
+ve
I high leg control
J matched pairs eg age, ethnicity
E high int validity as confound could affect brain activation so relation betw brain activity and violence measured
However selected trait reduce rep of wider pop
-ve
I however prob as 23 had brain injuries compared to none in control
J differences in brain activity betw 2 groups might not be due to murder or aggression but due to head injurie
brain injuries can affect impulse control, aggression, and decision-making,
unclear whether the observed differences in brain scans by being a murderer or by previous brain damage.
E Weak int v making it harder to establish a clear cause-and-effect relationship eg uncertain that other factors led to violence
