Flashcards
neural and hormonal aggression
Cards in this deck (13)
- 1What are the 2 explanation to do with neural mechanisms in aggression?The limbic system and seratonin
- 2Who first attempted to link limbic structures to aggression and who revised this?Papez and Mclean
- 3What are some of the most important areas that the limbic system consists of?The Amygdala, hympothalamus and hippocampus
- 4Why is the amygdala so important and what does it do?The amygdala helps in assessing how an organism should respond to challenges and threats. It's also a good predictor of aggressive behaviour.
- 5Who did the ultimatum game? What is it?Gospic used a well established lab experiment game (like golden balls) where P offers to split money with R. If R accepts, they split as proposed, if R rejects they both recieve nothing. R's had their brains scanned by fmri as they played.
- 6What were the findings of Gospic ultimatum game?When they responded to unfair offers there was a fast and heightened amygdala response. They also found that benzodiazepine (reduces ANS arousal) taken before the game both halved the number of rejections and decreased amygdala activity.
- 7What is Seratonins role in aggression? part 1Neurotransmitter - communication of impulses between neurons with inhibitory effect on neuronal activity. Normal levels in orbitofrontal cortex linked with reduced firing of neurons (associated with greater self-control.) Decreased serotonin may disrupt this and lead to more impulsive behaviour.
- 8What is the study for seratonins role in aggression?Virkkunen compared levels of seratonin breakdown product (metabolite 5-HIAA) in cerebrospinal fluid of violent impulsive (levels a lot lower) and violent non-impulsive offenders. violent impulsive also had sleep problems.
- 9What is the idea of hormonal roles in aggression?males = observably more aggressive than females. (so looked at testosterone) T has role in regulating social behaviour through its influence on certain brain areas.
- 10Give one example of a study into testosterones role in aggression.Animal study - Giammanco demonstrated experimental increases in testosterone are related to greater aggressive behaviour in some species. (converse is also true about decreased T)
- 11Berman found that drugs that increase seratonin decrease aggressionBerman either gave P's a placebo or dose or paroxetine who then took part in lab game where varying degrees of shocks were given and received in response to provoking. The paroxetine participants gave less intense and fewer shocks than the placebo group but this was only true for those who had a prior history of aggressive behaviour.
- 12Other brain structures have a role: It appears the orbitofrontal cortex (not part of limbic system) works in tandem with the amygdala.OFC involved in self control and inhibiting aggressive behaviour. Caccaro et al: patients w/ psychiatric disorders which often feature aggression, activity is reduced disrupting its impulse-control function and leading to aggression. Combined with Gospics findings would suggest they work together.
- 13Mazur tries to explain the link between testosterone and aggression, how? Who did a study which supports this and what did they do?Mazur's 'biosocial model of status'. Testosterone changes through day especially according to social interaction related to status. e.g. change in T after loss should affect post-competition aggression.
Mehta and Josephs support: measured T changes before and after game (which they all lost). After 2nd sample - P's had choice: challenge victor or compete unrelated task. Losers where T rose, 73% rechallenged, losers whose T dropped only 22% rechallenged.
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- GCSE Psychology Flashcards on neural and hormonal aggression , created by Sophie Wembridge on 09/06/2018.
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