Neural Mechanisms in Aggression - Serotonin

  • Created by: rosannaaa
  • Created on: 07-04-18 12:44
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  • AGGRESSION - SEROTONIN (NEURAL)
    • Serotonin = neurotransmitter involved in communication of impulses between neurons.
    • Low levels associated with agg, risk taking behaviour in animals, humans.
    • Inhibits the firing of amygdala.
    • Normal levels of serotonin in orbitofrontal cortex linked with firing of neruons and this associated with greater degree of behavioural self control
      • Decreased serotonin may disturb this mechanism, reducing self control, leading to increase in impulsive behaviour (agg) - Denson et al 2012.
    • Dexfenfluamine is drug that alters serotonin levels and increase agg behaviour.
      • Tryptophan is amino acid that produces serotonin - high levels of try = high levels of serotonin = decreased agg.
    • Normal elvels exerts a calming, inhibitory effect on neural firing in the brain.
    • Serotonin regulates sleep patterns
  • Has widespread inhibitory effects on the brain.
    • Slows down and dampens neuronal activity.
  • Normal levels of serotonin in orbitofrontal cortex linked with firing of neruons and this associated with greater degree of behavioural self control
    • Decreased serotonin may disturb this mechanism, reducing self control, leading to increase in impulsive behaviour (agg) - Denson et al 2012.
  • Serotonin deficiency hypothesis - serotonin influences agg, violent behaviour, oversleeping, depression

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