Aggression Flashcards
Parts of the limbic system?
- hypothalamus
- amygdala
- hippocampus
- fornix
- cingulate gurus
What is the amygdalas role?
Controls emotion, heightened response has been shown on FMRI scans in aggression.
What does the limbic system do?
A subcortical structure that deals with emotional behaviour such as aggression.
… levels of serotonin cause aggression?
Decreased.
What is serotonin responsible for?
Self control.
Neural evaluations?
(+) proof that serotonin drugs do work, Berman study.
(-) limbic system isn’t alone
… levels of testosterone cause aggression?
Increased.
What limits male aggression?
Castration.
… levels of progesterone cause female aggression?
Low.
When are women most aggressive?
During menstrual cycle.
Hormone evaluations?
(+) animal research, Giammanco monkey study.
(-) human cognitive abilities.
(-) animal studies issues.
(-) gender bias.
Twin studies concordance rate for aggression?
( Coccaro research on assault)
Mz twins= 50% Dz twins= 19%
Why are adoption studies good?
Can separate nature and nurture.
What does MAOA stand for?
Monoamine oxidase A gene
(Warrior gene.)
Low activity MAOA causes?
Deficiency of seotonin, causing aggression.
Whose study supports MAOA gene?
Brunner Dutch men study.
How does the diathesis stress model explain aggression?
Genetic predisposition= MAOA
Trigger= trauma in first 15 years
Evaluations of genetic?
(+) accounts for both genders.
(-) reductionist.
(-) unclear serotonin link, faulty levels.
(-) twin study issues.
What does the ethological approach say aggression is?
- an innate instinct.
- doesn’t need to be linked.
What are adaptive benefits of aggression?
Expansion of territories and status/control.
What are appeasement displays?
Series of behaviours carried out in the same order which indicate vulnerability, prevent killing.
What’s an innate releasing mechanism?
A physiological process like a network on neurons in the brain.
What are fixed action patterns?
A sequence of stereotyped behaviours triggered by IRM. Three features: universal, unaffected by learning and single purpose.
Whose study supports IRM for ritualistic aggression?
Trinbergen stickle back study in mating season.
Ethological evaluations:
(+) Brunner support
(+) Trinbergen support
(-) not always ritualised, Tanzania monkeys
(-) biological reductionism
What does adaptive mean?
Something that enhances survival/reproduction.