split brain research into hemespherical laterlisation

Question 1

what is hemispherical lateralisation?

Answer 1

where a function is localised to one hemisphere

Question 2

what is an example of hemispherical lateralisation?

Answer 2

language

Question 3

what type of study was Sperry’s?

Answer 3

quasi

Question 4

what procedure did the Sperry’s ppts have and why?

Answer 4

the ppts had commissurotomies (the corpus callosum was cut as well as other connective tissue) to control severe and frequent epileptic seizures

Question 5

describe the standard procedure

Answer 5

an image was projected into either the LFV of the RFV for 1/10th of a second while the ppts looked at a focus point so they couldn’t scan the image

Question 6

how where the ppts brains different from neurotypical brains?

Answer 6

a neurotypical brain would be able to share information between the two hemispheres, however, the ppts brains were unable to do this

Question 7

describe the findings of ‘describe what you see’

Answer 7

when the image was in the RVf the ppts could verbally describe the image however when it was in the LFV the ppts frequently reported there being nothing there. the ppts could draw their LFV with eyes closed

Question 8

describe the findings of ‘recognition by touch’

Answer 8

in the LFV ppts could match the image to an associated object without looking

Question 9

describe the findings of ‘faces made of objects’

Answer 9

when the image was shown in the LVF a face was recognised, but when shown in the RVF the objects were recognised

Question 10

how does this research contribute to our understanding of brain processes?

Answer 10

research suggests the left hemisphere is the analyzer whilst the right hemisphere is the synthesiser

Question 11

how is the standard procedure highly specialised?

Answer 11

• the fixation point
• the image was shown for 1/10th a second so ppt couldn’t move their eyes
• replications have found the same results

Question 12

why is generalisation a weakness?

Answer 12

• ppts were very unusual
• a control group of 11 without epilepsy
• only 11 ppt

Question 13

what id the theoretical debate related to this?

Answer 13

whether we have two minds one from each hemisphere oof one highly integrated mind where both hemispheres are involved in everyday tasks

Question 14

describe the Kim Peak case study

Answer 14

born without a corpus callosum, he could read 2 pages at once, one with each eye in 10 seconds which would normally take us 3 mins and had 98% recall accuracy