localisation of function in the brain

Question 2

localisation

Answer 2

out phsyical and psychological abilities all come from specific brain areas

bfeore this discrovery longed belived holsitic theory was correct, assumed that the whole brain is involved in all brain processes

Question 3

hemispheres of brain

Answer 3

brain split into two halves (hemispheres)

each hemisphere is dominant for difefrent abilities (hemispheric lacterisaltion)

left hemisphere is dominant for language processing
right hemisphere is dominant for spatial processing

also contralacteral-left hemisphere controls the right side of the body and the right hemsiphere controls the left side of the body

outler layerrs of each hemisphere is called cellerburm cortex-which consists of grey matter which seperates us intellectually with animals

Question 4

lobes of the brain

Answer 4

frontal lobe-back of lobe contains the motor area. where the brain processes movement
pariental lobe-forn of lobe contains somotsensory lobe, where brain processes touch
occupital lobe-contains visual area. brain processes sight
temoral lobe-contains audiaorty area, brai provesses what you hear

Question 5

language areas of the brain

Answer 5

language restricted to left side of the brain

paul broca-identified small area in left frontal lobe responsible for speech production
area called braocs area
damage to this area=broacs aphasia which is slow speech and lacks flucency

karl wernicke-identifiedd small area in left temperol lobe repsonsible for lanaguage comprehension
aarea called wernickes area
damage to area=wernicke apahasia which is producing nonsense words

Question 6

strength of localitsion of brain

Answer 6

phineas gagem

working on railroad
involved in accident where tampering iron went through his skull

survived but before accident was calm, researved perosn wheras after was quick tempered and agression

suggests frontal lobe may have something to do with mood regualtion

Question 7

weakness of localisation of brain

Answer 7

not all localised

karl lashley suggests some higher cognive functions are not localised but instead distributed in a more holisitc way

sturided this by removing 10 and 50 percent of cortex in brains of rats trying to get through a maze

learning of maze appeared to involve every area of the cortex ratherr than a speciifc lobe or area