Neural and Hormonal

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  • Created by: caitlin
  • Created on: 20-05-14 18:38
Serotonin
is thought to reduce aggression by inhibiting responses to emotional stimuli that might otherwise lead to an aggressive response. LOW levels of serotonin have been linked to aggression.
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Serotonin Research
Mann et al gave 35 healthy subjects dexfenfluramine which is known to deplete serotonin. Using a questionnaire he measure hostility levels and found the drug had increase aggression scores in men BUT not women
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Bond et al
found that anti depressants could clinically rise serotonin levels to lower aggression.
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Dopamine
High levels of dopamine are associated with higher levels of aggression. (Lavine) Buitelaar found that anti-psychotics that lower dopamine has also lowered aggression levels.
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Research is fairly inconclusive and link is not well established but Couppis and Kenned
found that in mice a reward pathway in the brain is engaged during aggressive events. Dopamine acts as a positive reinforcer encouraging chances of aggressive behavior happening again to experience positive feeling again
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Testosterone (male sex hormone )
is thought to influence aggression. Dabbs measured the testosterone levels in violent and non-violent criminals. Thoses with the highest testosterone had hisory of primarily violent crimes whereas low levels of testosterone had committed non-violent
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Lindman et al
Men with higher testosterone levels also acted more aggressively when drunk than low leveled individuals
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Albert et al
claims that despite many studies showing positive correlations between testosterone and aggression, other studies have found no such relationship. Most studies use a small sample of men in prisons (NOT VALID OR GENERALIABLE)
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Gender Bias
Archer's research suggested the link between testosterone and females was in fact higher. Baucom also found that women with levels of testosterone had hihger occupational jobs, possibly as a result of being more assertive. (NO SCIENTIFIC EVIDENCE)
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cortisol
inhibits testosterone levels and inhibits aggression. Low levels of cortisol result in higher aggression.
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McBurnett et al
boys with low levels of cortisol had more antisocial behaviour and exhibited three times more aggressive behavior compared to boys with higher or fluctuating levels.
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Reductionist
Complexity of human behavior reduced down to biological facts
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Card 2

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Serotonin Research

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Mann et al gave 35 healthy subjects dexfenfluramine which is known to deplete serotonin. Using a questionnaire he measure hostility levels and found the drug had increase aggression scores in men BUT not women

Card 3

Front

Bond et al

Back

Preview of the front of card 3

Card 4

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Dopamine

Back

Preview of the front of card 4

Card 5

Front

Research is fairly inconclusive and link is not well established but Couppis and Kenned

Back

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