Neural Explanations to Aggression

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  • Created by: Koduka
  • Created on: 13-01-16 10:48
Serotonin
Thought to reduce aggression by inhibiting the amygdala and therefore the responses to emotional stimuli that might otherwise lead to an aggressive response.
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MANN ET AL
Gave 35 healthy subjects dexfenfluramine which is known to deplete serotonin. Using a questionnaire to assess hostility and aggression levels, they found that dexfenfluramine treatment in males (but not females) was associated with an increase in
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BOND
Established in clinical trials that this is what happens antidepressant drugs elevate serotonin and therefore drugs do reduce irritability and impulsive aggression.
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RALEIGH ET AL
Using Vervet monkeys found that those on high tryptophan diets (which increases serotonin levels in the brain) exhibited decreased levels of aggression and vice versa
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POPOVA ET AL
Shown that in animals bred for domestication and docile temperaments show over time increased levels of serotonin
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ARORA AND MELTZER
Research has found that victims of violent suicide had increased numbers of serotonin receptors in the prefrontal cortex
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BADAWY
Found a link between alcohol consumption and aggressive behaviour, however this is only a correlational relationship and other factors, such as alcohol consumption because of depression (depression is also linked to low serotonin levels) confuse th
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Dopamine
The link between dopamine and aggression is not as well established but it is thought that increases in dopamine will produce an increase in aggressive behaviour.
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LAVINE
Increases in dopamine activity via the use of amphetamines have also been associated with aggressive behaviour.
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BUITELAAR
Antipsychotics, which reduce dopamine activity in the brain, have been shown to reduce aggressive behaviour in violent delinquents.
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COUPPIS AND KENNEDY
Found in mice that, a reward pathway in the brain becomes engaged in response to an aggressive event that the dopamine is as involved as a positive reinforcer in this pathway. Individuals will seek out an aggressive encounter to receive a rewardin
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Card 2

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Gave 35 healthy subjects dexfenfluramine which is known to deplete serotonin. Using a questionnaire to assess hostility and aggression levels, they found that dexfenfluramine treatment in males (but not females) was associated with an increase in

Back

MANN ET AL

Card 3

Front

Established in clinical trials that this is what happens antidepressant drugs elevate serotonin and therefore drugs do reduce irritability and impulsive aggression.

Back

Preview of the back of card 3

Card 4

Front

Using Vervet monkeys found that those on high tryptophan diets (which increases serotonin levels in the brain) exhibited decreased levels of aggression and vice versa

Back

Preview of the back of card 4

Card 5

Front

Shown that in animals bred for domestication and docile temperaments show over time increased levels of serotonin

Back

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