Hemispheric Lateralisation Flashcards
What is it?
Brain is lateralised as there are two hempispheres which are connected by the corpus callosum
- some functions are localised
- brain is contralateral (LVF -> Rhem -> Lhand)
Split brain research - who did it?
Sperry
Why were the brains split?
- hemispheres seperated by cutting corpus callosum
- to treat sever epilepsy
Split brain research method
- 11pts stare at fixation point on a screen
- slides shown for 1/10th secons of words or images
Split brain research findings
- RVF - ppt decribe in speech and writng
- LVF - say seen nothing but can feel/ draw with left hand
Facial recognition variation
Different face shown to each VF
- ppt selects face from LVF and decribe RVF face
- = recognition is right hem
Language variation
Wall clock pic in LVF
- ppts could pick up writwatch with left hand (semantic processing)
- some language = right hem
Split brain conclusion
hemispheres act independently
- Righ hem = recall and identification (non-verbal)
- Left hem - speech and writing
Left hem speech
Production and comprehension
Left hem auditory processing
Sounds related to speech
Left hem visual processing
Fine details
Right hem speech
Understand emotional tone and content
Right hem auditory processing
Non language sounds e.g. rain
Right hem visual processing
Bigger pic and spatial processing
AO3 + Procedure
- fixation point and brief presentation prevent eye tracking
- standardisation means reliability can be checked
