Hemispheric lateralisation

Question 1

Hemispheric lateralisation

Answer 1

Ability to produce and understand language is controlled by left hemisphere
left visual field - right hemisphere
right visual field - left hemisphere

Question 2

Link between hemispheres

Answer 2

Corpus callosum - bundle of nerve fibers that connect two halves

Question 3

Split-brain studies

Answer 3

Corpus collosum cut to control their epilepsy
No way hemispheres could communicate

Question 4

Sperry’s split brain study

Answer 4

Image or word projected to right visual field or left visual field
Patient asked to make response with left hand or right hand or verbally ( left hemisphere)

Question 5

Findings

Answer 5

Right visual field (flashed image) could answer because left hemisphere processes language + RVF

Left visual field - cant say anything
Processes image by right hemisphere but NO language centre

Touch:
LVF - cannot verbally describe, selecting matching with left hand

Question 6

AO3

Answer 6

Supporting evidence for lateralisation
Different roles

Low reliability
Small sample - 11 patients
All have epilepsy

Controlled procedure
Image flashed for 0.1 seconds
No time to move eyes
Stare at black dot