Explain what is meant by hemispheric lateralisation
The two halves of the human brain each have functional specialisations
All of the brain is involved in processing
Certain functions of the brain have certain locations in specific brain regions
To investigate the of each hemisphere, Sperry used 11 patients who had their severed to reduce severe symptoms. So the two hemispheres could not information.
The functions of the left hemisphere of the brain are: ❌, ❌, ❌ and it is ❌-handed
The functions of the right hemisphere are: ❌, ❌, ❌, and it is ❌-handed
Sperry's split brain research: he used a screen to present an image or word to the left or right . A range of tasks was used, involving patients responding with their left hand ( hemisphere) or right hand or ( hemisphere).
In Sperry's 'Describe what you see' task, patients...
...named an image presented in their RVF but not their LVF
... couldn't name image presented in RVF but could draw it using their right hand
...couldn't name image presented in LVF but could draw it using their left hand
...named an image presented in their LVF but not their RVF
In Sperry's 'Recogniton by touch' task, patients...
...couldn't name an image presented in LVF but could select it from bag of objects using left hand
...couldn't name an image presented in RVF but could select it from bag of objects using right hand
...could name an image presented in RVF and could select an object
...could name an image presented in RVF and but could not select an object
...couldn't name an image presented in RVF and couldn't select an object
In Sperry's 'Composite words' task, 2 words were presented simultaneously one on each visual field. e.g. key on the LVF and ring on the RVF. Patients...
... could say LVF word - Key...
... could write LVF word - Key...
...and could say the RVF word - ring
...and could write the RVF word - ring
Label the different lobes of the brain
Label the areas of the brain
Label the main functions of each area
The function of the motor cortex is to movements. It sends to on the opposite side of the body. The left controls on the side vice versa.
The function of the auditory area is to process and based information. Info received by the left ear is processed by the vice versa.
The function of the somatosensory area is to process information from the - including heat, touch and . The more the area of the body, the part of the somatosensory area is to it. E.g. Over half of this are is for and face.
The function of the visual is to receive and process visual information. Each eye sends information from right visual to , vice versa.
Damage to the Broca's area causes what?
Producing meaningless speech
Producing speech that is slow, laborious and lacking in fluency
Damage to Wernicke's area causes what?
What is each area responsible for?
Where is each area localised?
found using scans that London taxi drivers have a large of matter in the than in non taxi drivers. This is an area associated with spatial and . This shows that certain are localised in areas of the brain, as theory
A limitation of localisation theory comes from ... criticised the claim that functions are localised, by proposing the theory- that and sensory functions are localised, but functions (e.g. ) are not. So not all functions may be localised
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