Aggression - the role of neural mechanisms

Question 1

Brown

Answer 1

Serotonin - the major metabolite of serotonin tends to be low in the cerebrospinal fluid of people who display impulsive or aggressive behaviour

Question 2

Mann

Answer 2

Serotonin - lab study and questionnaire - administered the drug dexfenfluramine (helps with weight loss) to 35 healthy adults - the drug is known to deplete serotonin levels in the brain - found among males hostility and aggression levels increased after the treatment

Question 3

LeVine

Answer 3

Dopamine - increases in dopamine activity are associated with increases in aggressive behaviour

Question 4

Buitelaar

Answer 4

Dopamine - the use of dopamine antagonists have been successful as a way of reducing aggressive behaviour in violent delinquents

Question 5

Ferrari

Answer 5

In anticipation of a fight, rat’s dopamine levels increased and serotonin decreased

Question 6

Couppis

Answer 6

dopamine is linked to movement and self-initiated actions so by turning off dopamine in animal’s brain makes it difficult for them to move

Question 7

Delgado

Answer 7

Brain structure - research on bulls, activity in the caudate nucleus at the base of the brain inhibits aggression as he stimulated it via a radio operated electrode

Question 8

Raine

Answer 8

Brain structure - MRI scans on anti-social personality disorder (psychopathy) - 11% less neutrons in the pre-frontal cortex

Question 9

P Gage

Answer 9

Brain structure - got a tamping iron through his head - led to a change of persona and became aggressive