Lateralisation And Split Brain Research Flashcards
What is split brain research
Research that studies individuals that had surgery separating 2 hemispheres resulting in severing corpus callosum
Describe sperry and Gazzangiga study
Aim: extent in which 2 hemispheres are specialised for certain functions
Procedure: -quasi experiment with 11 patients who undergo corpus callosumy
1. Describe what you see- picture displayed in left or right visual field
2. Recognising objects placed in hand- object placed in left or right hand and they describe what they feel
3.drawing tasks- picture displayed in left or right visual field- draw what they see
What are the findings of sperry and Gazzinga study
- Describe what you see- right hemisphere= couldnt describe- left visual field
Left hemisphere= could describe- right hemisphere
2.objects placed in hand= right hand= could describe- processed by left hemisphere, left hand= processed by right hemisphere, couldn’t describe what they felt - Drawing task - left hand- clear pic - right hemisphere - left visual field
Right hand- left hemisphere- couldn’t describe - right visual field
What is hemispheric lateralisation
Each half(hemisphere) of the brain has functional specialities
Left is dominant for speech and language whereas right is visual motor tasks
2 hemispheres connected by corpus callosum which allows left and right hemisphere to communicate
AO3
— research shown lateralisation changes with age
- language more lateralised in children in the left hemisphere after age 25- lateralisation decreased with each decade of life
—language isn’t restricted in left hemisphere
- patients suffered from damage in left hemisphere- spoke in right and eventually spoke info presented in both sides
—research carried out on animals
- can’t generalise- more complex- split brain research is rare- difficult to find patients
+ perform multiple tasks simultaneously
-research shown using chicken- lateralisation enhances ability to do 2 tasks- one hemisphere for one task
