Localisation Flashcards
What is localisation
Specific functions of the rain have specific religions and locations some functions more localised than others
What is the motor cortex 3 marks
Band of brain found in frontal lobe in the precentral gurus
It spans across left and right side and exists as contralateral the left side of the brain control right muscle movement and vice eras
It is responsible for the voluntry motor movements
what is the somatosensory cortex
the reigion found in the parietal lobe in the postcentral gyrus. it processes sensory information and detects sensory events arising from different areas of the body. can detect heat, pain , temperature, pressure localising to specific body reigion both hemispheres contain the somatosensory cortex and it is contralateral
what is the visual centre and where does it begin
visual cortex is in the occipital lobe of the brain however visual processing actually begins in the retina and the back of the eye where light enters and strikes the photoreceptors
what happens in the eye- nerve impulses
the nerve impulses from the retina are then transmitted to the brian via the optic nerve
where is the visula cortex found
found on both sides of the brain left side of the brain deal with right infor and vice versa it is contra lateral, in the visual centre there are lots of different areas which process different visuak information
what is the auditory centre important for
hearing and it is based in the auditory cortex
lies within the temporal lobe on both sides of the brain, the auditory pathway begins in the cochlea and the inner ear where the sound waves are converted to nerve impulses which travel via the auditory nerve to the auditory cortex however it is not contralateral
what is the brocca’s area important for.
brocca’s area is the language centre portion of the brain in the frontal lobe of the left hemisohere the area is critical for speech production
what is the weirnickes area special for
it is used to undertsand speech and found in the posterior reigion in the left temporal lobe.
what happens if you damage part of your language centre
if you damage your brocca’s area you will be able to undertsnad speech but not speak. if you have damaged you weirnecks you will be able to speak but not undertsnad languagethus connections between the other areas is needed because language involves the use of motor movement of the tounge and the lips so the different cortical reigions of the brain is needed
what is the suipport from aphasia studies
broca’s region can lead to difficultyy in speech production( expressive aphasia ) and damage to the weirnecks can lead to receptive aphasia. this is a strength as language and our understanding of localisation is based on specific reigions of the brain which is responsible for specific functions and damage to those reigions impairs the functions therefore these studies increase the validity of the localisation models of the brain.
what did the brain scans do and show
peterson et al used brain scans to demonstrate weirnicke;s aarea was active during a listening task and broacas area was active during a reading aloud task. as these different areas have been active whilst the brain undertakes these set function this goes to demonstrate that different parts of the brain have different role sand there is an objective empirical and psychological evidence to show that the brain uses different compartments in different reigions whith different functions
why may communication be more important than localisation
there may be an over simplifisation of explanation of how the brain works and that communication between the different areas may be more important. weirnicks claimed that although different areas of the brain specialised in differnt functions they are interdependent and in the sense that they must interatc with each other, for example in speech production you need the broca’s area alongside the motor area to move the tongue and the mouth this suggest that in order to have a converstaion the auditory centres need to be connected to the brocca’s area because we need to hear the speech in order to undertsnad this is a problem because it suggests that the complex behaviours like language must rely on interconnection but this is not being acknowledged by the localisation model as it doesn’t say that different information must be moved between structures to produce a response.
