Study on Relationship Between Hormones and Aggression in Different Animals and Human
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To compare brain activity in 41 convicted violent offenders to activity in 41 age matched control
subjects. They found that the people convicted of murder had reduced activity in the prefrontal
cortex and increased activity in sub-cortical regions such as the thalamus. This finding fits nicely
with previous research showing that the damage to the prefrontal cortex impairs decision
making and increasing impulsive behavior. Indeed, Raine's work is perhaps the best evidence yet
that impaired brain functioning may underlie some types of violent aggression. However, it is
important to remember that his subjects lie at the extreme end of a spectrum and may not be
typical of most aggressors.
Keywords: prefrontal cortex; evidence; aggression
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