Lateralisation and split brain research

Question 1

What does lateralization mean

Answer 1

It refers to when 2 halves of the brain which aren’t a like

Question 2

What is the name of the structure which transfers info between the two halves of the brain

Answer 2

The corpus-callosum

Question 3

TRUE or FALSE
Does each side of the brain have the same function

Answer 3

FALSE
each side has its own associated function

Question 4

LEFT HEMISPHERE: what side does it receive info and visual info from

Answer 4

THE RIGHT SIDE

Question 5

LEFT HEMISPHERE: what does this half of the brain control for

Answer 5

Speech
Language
Comprehension
Analysis + calculations
Time and sequencing
Recognition of words and letters and numbers

Question 6

RIGHT HEMISPHERE: what side does it receive info and visual info from

Answer 6

THE LEFT SIDE

Question 7

RIGHT HEMISPHERE: what does it control

Answer 7

Creativity
Spatial ability
Context perception
Recognition of faces, places and objects

Question 8

How does sensory stimuli from the right visual field enter the brain

Answer 8

Sensory stimuli from the right visual field is seen with BOTH eyeballs however it is processed in the LEFT hemisphere

Question 9

How does sensory stimuli in the left visual field enter the brain

Answer 9

Sensory stimuli from the right visual field is seen with BOTH eyeballs however it is processed in the RIGHT hemisphere

Question 10

What was one treatment to prevent epilepsy to do with the brain

Answer 10

Severe the corpus callosum

Question 11

What was the reasoning for severing the corpus callosum

Answer 11

Splitting the corpus callosum breaks communication line being broken, researchers have seen to what extent the hemisphere can work independently

Question 12

Who created split brain research

Answer 12

SPERRY

Question 13

Who created split brain research

Answer 13

SPERRY

Question 14

What was the aim of Sperrys split brain research

Answer 14

To investigate the abilities of those with split brains

Question 15

What was the procedure of Sperrys research

Answer 15

An image or word is projected to p.t’s right visual field and the same or different image was projected to left visual field — in a normal brain this info would be shared however, due to split brain there’s a difference

11 p.t w/ split brain with history of advanced epilepsy
•p.t stare at a point in The middle then complete a series of tasks
—> describing, recognizing by touch, composite words and matching faces

Compared the split brain results with normal brains

Question 16

What did Sperry find when researching split brains in each task

Answer 16

Describing what you see: when shown in right visual field people can describe it due to language being in the left hemisphere, however if same image is shown in left visual field p.t can’t describe it

Recognition by touch: when shown image in left visual field p.t could select the image by touch with left hand — this is true for right VF and right hand

Composite words: 2 words presented, one in left VF one in right VF — the p.t would be able to say the word in the right VF and draw the word in left VF with left hand

Matching faces: when presented with faces in both visual fields, p.t were quicker to match the face presented in the left VF processed by the right hemisphere and other image ignored

Question 17

What was the conclusion of split brain research

Answer 17

Clear differences between split brain p.t however it’s apparent that the diff hemispheres have diff functions to one another however generally all processing requires both hemispheres

Question 18

What is a strength of split brain research

Answer 18

P: Sperrys research was standardized procedure
E: Sperrys method of presenting visual info to one hemispheric field at a time using a fixation point
E: an image would then be projected for approx. 1/10 of a sec meaning there isn’t enough time to move their eye to spread info across both hemispheres
L: This allowed sperry to vary aspects of the basic procedure and ensured that only one hemisphere was receiving info at a time

Question 19

What is a limitation of split brain research

Answer 19

P: split brain patients are a unique sample
E: e.g only 11 who took part in all variation of the basic procedure who all had advanced epilepsy
E:it has been argued that this may have caused unique changes in the brain that could’ve influenced the findings
L: therefore it’s hard to generalize results

Question 20

What is a limitation of split brain research

Answer 20

P: split brain patients are a unique sample
E: e.g only 11 who took part in all variation of the basic procedure who all had advanced epilepsy
E:it has been argued that this may have caused unique changes in the brain that could’ve influenced the findings
L: therefore it’s hard to generalize results