Genetic Factors



  1. MAOA Gene
  2. associated with agression> regulates metabolism of serotonin in the brain. 

Brunner> dutch fam in 80s, males particularly agressive, led to abnormally low MAOA gene levels. 

H/ever: behaviour could be learnt from older members influencing behaviour thru principles of SLT/imitation. 

  • Researchers also look at gene-env interaction.
  • found variant of MAOA where low levels= agression but only if maltreated during childhood. 


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