Neurotransmitters and aggressive behaviour

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  • Created by: mollyannh
  • Created on: 01-12-14 13:06
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  • Neurotransmitters
    • Serotonin - reduce aggression by inhibiting responses to emotional stimuli.
      • Low levels of serotonin in the brain has been associated with increased susceptibility to impulsive behaviour, aggression and violent suicide.
        • Some drugs are thought to alter serotonin levels, thus increasing aggressive behaviour.
          • Mann et al (1990) gave 35 healthy subjects dexfenfluramine (known to deplete serotonin). Using a questionnaire to assess hostility and aggression levels.
            • Findings: that dexfenfluramine treatment in males (but not females)was associated with an increase in hostility and aggression scores.
    • Dopamine - dopamine and aggressive behaviour is not as well established as with serotonin
      • Increases in dopamine activity via the use of amphetamines has also been associated with increases in aggressive behaviour (Lavine, 1997)
        • Antipsychotics which reduce dopamine activity in the brain, have been shown to reduce aggressive behaviour in violent delinquents (Buitelaar, 2003)


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