neural and hormonal Flashcards
(11 cards)
neural influences on aggression
limbic system
amygdala
hippocampus
serotonin
limbic system , neural influences
identified by papez , expanded by Maclean
includes structures e.g amygdala , hippocampus , hypothalamus , thalamus
- controls emotions , motivates behaviours e.g aggression
amygdala , neural influence
- evlaluates sensory information , and triggers emotional response
- if overstimulated , aggressive response can happen
- if damaged/removed , aggression reduced
kluver and bucy -
monkeys w destroyed amygdalas = passive and lost social dominance
hippocampus , neural influence
helps form ltm , and gives context to situations
- damage leads to innapropriate aggressive responses
boccardi = violent offenders often had damaged hippocampal functions
serotonin , neural influence
neurotransmitter w calming effect on brain
low lvls = reduced inhibitions = more likely to act aggressive
mann et al = low levels increased aggression in males not females
hormonal influences on aggression
testosterone
testosterone , hormonal influence
- male sex hormone thats linked to aggression
- acts on brain areas that control aggression
removing test = removes aggression
strength , serotonin
evidence suggesting link between low serotonin and aggression
Raleigh and rosado , found monkeys and dogs with low serotonin , showed more aggression
limitation , reductionist
ignores social/enviro factos , only focuses on brain
limitation , cause and effect serotonin
low serotonin may come from aggression , not cause it , hard to know cause + effect
strength , test
Wagner
injected test in animals , increased aggression , clear hormonal effect