pysch p3 aggression Flashcards
What is the limbic systems and what structures does it involve?
limbic structures are strucutures within the subcortical region of the brain that include the hyopthalmus, amygdala and hippocampus.
what is the role of the amygdala?
is a predictor or has a role in respoding to aggressive behaviour and resposding the a environment which is seen as threatening so more heightened the amygdala, is the more aggressive will the person be.
descrieb the study that showed the role of the amygdala in aggression?
some particpiant provoked and fMRI scans showed that a fast and heightened response by the amygdala when they displayed aggressive behaviour.. But when given the drug benzopiazipene which reduces the arousal of the sympathetic nervous system they was decarseed aggression because it had lowered the actovty of the amygdala.
What is the role of the obriatl frontal cortex?
Normal levels of sertaonin, linked with the reduced firing of neurons so then greater self control of behaviour.
what effect does seratonin have on the brain?
has inhibitory effect and slows down neuronal activity, so if OFC has decreased serotonin then more impulsive behaviour and then more aggressiveness.
What is testosterones and what is it responsible for?
testosterones is the male sex hormone responsible for male features and is the reason why men are more aggressive than women because they have higher levels of it, is responsible for regulating certain social behaviours.
what do castration studioes show abput testrorenone in aggression?
removal of testes meant that the production of testrone was reduced or low so there was reductiuon in aggressive behviour of the species
another study found that there was positve correltation between testosterones levels and personlaity diroder and aggressive behaviour they were resprobile for.
What do low levels of progesterone do in women?
shows a important role in aggression in women as repots have found a negative correlation between women and progesterone levels
this is especially seen just after the menstrual phase where progesterone ; levels are low so they tend to be more aggressive and moody.
What is one strength of the hormonal mechanisms in explaining aggression?
one stregnth of HM for aggression is studies from animals. in male rhesus monkeys it was found that there was an ijcrseaede level of tetsroren and aggresive behaviour during the mating season and in rats the castration of tetst meant less mouse killing behaviour, therfore this shows a dircet link ebtween testroenr and aggression.
One limiation of dual hormone hypothesis HM?
one - is that there is mixed evidence showing how testroen may cause aggression in males but there maybe two hormones influenvcing each other. This is because high levels of testosterone can only lead to aggressive behaviour when coritsol level are low. but when cortisol is high then testosterone influence is blocked., therefore combined actviity of T and cortisol are better explanation for aggression
Why is drugs and serotini a stregnth for neural mechanisms in aggression?
rseaerch shwos the role of seratonin effects of drugs and aggression.
this is becausse drugs such as aproxetine increases seratonin levels ahs been found to also reduce aggressive behaviour.. Evidince for this comes from PTS who were playing a lab based games that involved giving and recieving electric shcoks in resoponse to provocation. the groups with the drug gave fewer/less shocks than the placebo group. showing a causal link between seratonin and aggressiion.
why are other brain structures a - for neural mechnaisms in aggression?
this is becasue recent resecrach has found there are onther nonlimbic sturctures brain structures involvedin aggression.
Limbic structures such as the amygdala function togther with the OFC which isnt part of the limibic system.. The OFC is involved in impuse regulation ad inhibiting aggressive behaviour, and evidience shows that OFC activity is reduced in those with psychiatric disorders and reduced activity block the OFC impulse control function, which makes the person behave more aggressively.
therefore its a limiation because the neural regulation of aggression is more than just the amgydala
What deso the etholgoical explannation of aggression suggest?
that aggression is adaptive
why is aggression seen as adaptive strategy?
becasue a its is beneficial to survval as the defeated animal or species is rarely killed., meaning that member of species are spread out have to discover a new place or resources to gain for which reduced the competition pressure and risk of species dying.
What is another adapative function of aggression?
able to estabalshih dominant hierchies, such as male chimpanzeez who use aggression to climb to thier troops social hierachy to attains status and many goals/means.
this is also seen in humans where children are aggressive to get to the top of a hierachy, and bring many beenfits to them for survival and would then be naturally selected.
define ritualistic aggresion?
a series of aggressive violent behaviours carried out in a order. lorenz had found that fights between same species rarey ever lead to physical damage and just usually show ritualistsic signalling such as claws, teeth.
how is this adaptive ?
becasue when appeasemnt signals are shown it shows surrender and vulnrbalty to the other species/animal, so if aggressive attack happened it wold lead to the death and then threaten the exisistence of species.
Define innate releasing mechanism?
is an inbuilt physiological process taht is truggered by a sepfic enrvomental stimuli that is percived as a threat. this then releases a specific sequence of behaviours FAP
what are 3 features of FAP?
universal same behavour found in each species
ballistic course has to be completed and wont stop until finished.
single purpose/to only occru ina specific situation
What did timbergans research on male stickleback fish find?
regardless of shape or model that he used if the red dot under the belly was found then the aggressive FAP were ran its completion
the red spot triggered the innate releasing mechnisma dn develops as way of protecting their teritory
What is one limiation of FAPs not being fixed?
the view of FAPs is outdated
as he saw them as fixed and innate, however a researcher found that these are greatlyinfluenced by envroemntal factorsan learning experiences. as he found that the duraton of each behaviour isnt fied but changes from encounter toencounter and depending on the type of threat. and becasue they are modified they are seen as modal behaviour pattern, therefore lorenzs idea of FAPS arent so applicable .
Why is ritualistic aggresion a limitation of the ETH for aggression?
one - is that aggression againts same species isnt always non violent and not just ritualistic. Evidience comes from a 4 year war observed by a rsearcher in chimpanzees and killed all member o another group and even though appeasemnt signsla were given they didnt inhibit theri aggressive ebhaviour, as predicted by lorenz.
this challneges thet view that ritualistic aggresion doesnt always lead to aggresion.
why is rsearch support a +for ETH for aggression?
research to support that coems from genetic ad evolution. such as the MAOA gene ad low variant leading to aggression in humans. and twin and adoption studies show that there is a significant genetic compment to agressiona s is inherited so genetically based., shwoing that it is natural and adaptive as it is naturally selected.
What is decribe sexual jelousy?
is a main cause of men being more aggressive and men unlike women can never be sure about whether they are or they raent rhier child parent. fear of cuckoldry having to raise offspring that not their own.