biospsych
what is contelateral in localisation of functiom
the idea that each hemisphere of the brain comtrols the oppsitie sode of the body
wjere is the motor coretex
at back of frontal lobe and contorls volumtsry moevemnt so damage can result in loss of muscle function
limitatiom of localisatiom of function
use of case studies are unscientific . eg in a recenet mri scan of tans brain it showed damamge far behond broccas areasuggesting other areas could be respobsible for tanns speech problems
what is plasticity
when rhe brain adapts in both its functions and structure as a result of changes in the environment
limitation pf plasticity
conlficting evidence to challnege it. eg one psychologist demonstrated that nor everyone has high levels of plssticity. this is hecsuse this psychokogist oufn that high Iq and eductionsl backrpund is positivly correlated withbetter outcomes after trauamtic brain injury suggesting some people will struggle with regaining function
how does flight of fight work
scn stimukates adrenal medulla to relase adrenaline
summation
if inhibitory inputs are greater than excistry inputs this will result in sn overwll inhibitory action potential sp whem an inhbutory jeurotramditter binds to the receptor of s post synaptic cell it will cause the post synaptic cell to be less likely to fore
what is hemispheric laterealizatiom
rhe idea thst the 2 hemispheres of the brsin are functionslly doffermt amd esch hemisphere is functionslly specialised. the two hemispheres are connected by a bridge known as the corpus callosum
an example of so,ething subject to hemispheric laterwlization
lanaguge
how is scn linked to light
scnc receivs infromstion from eyes abought light. so when light lebels wre low scn stimulates the
pinneal gland to release melatonin causing up to feel sleepy
what is functionsl recovery
where the brain recovers sbilities previously lost due to brain injruy
what does synaptic oruning ensure
makes the brsin a more efficent communication system over time
limitatiom of thetaxi study
issues with generlisatioms. small sample with onl 16 men and right ahnded drivers. As a reult it likely to be androcentric. so not useful in explaining plasiticity in women
what does the endocrine system do
communicates chemical signals to the organs of the body
issue with sperrys resesrch
only 11 people who also had history of epileptic seizures which could hage infleunced fimdimgs. impacts valdiity by lowering the generalisabikity
wjere are the receptors
om the postynsptic membrsne
how does synaptic transmissiom work
actiom potwntial triggers release of neurotrasmitfer
what comparison would i use for somatic vs auntomic
somatic controls skeletsl muscles sutonomic comtrols csrdisc
summation
the inhibitions amd excitations are summed and if the net effect is inhibitory them
ess likely to fire if exitwtory them more liekly to fire
if asked how the central nervous system is involved with fight or flight whst do i ssy
brain which is a division fo the cns- eg occipital lobe involved in processing info
eg temporal lobe imvolved in processing audiotry info
strength of sperrys work
he shower the imprtwmce of corpus callosuk in communicwtins messgaes between the 2 hemsipheres. therefore in servere cases, the removak ofnthe corpus callosum may benefit people with episepsy by prevemtimf kt sprewding betwene hemispheres
what type of fu mctional recovery imvolves unaffected wreas twkimf ovwr
unctionsl compensation
neural unmaskinf
ne synaptic conenctioms form close to the area of the dmaage to help recoger the damage