Split-Brain Research into Hemisphere Lateralisation Flashcards
What connects both hemisphere?
Corpus callosum
Define laterlisation:
One hemisphere of the brain being responsible for particular physical and psychological functions
The right side of the brain processes info from…
left half of the body
The left side of brain processes info from…
right half of the brain
What does the information from the right visual field process to?
Left hemisphere
What does the information from the left visual field process to?
Right hemisphere
Define split-brain research:
Series of studies which began in 1960s involving epileptic patients who have had surgery separating the two hemispheres
What is the surgery called when corpus callosum and surgery and other tissue are cut separating the two hemispheres?
Commissurotomy
Medically was commissurotomy good?
Seizures could be controlled
Who studied into split-brain patients?
Sperry (1968)
Who was Sperry (1968) participants?
- 11 patients who had previously undergo treatment for epilepsy
- compared to people without epilepsy and without the treatment
Procedure of Sperry (1968):
- Focused on dot in middle of screen
- One eye covered
- Words flashed up for 1/10 of a second
- Underneath screen & out of sight were items which could handled
What were the 4 different methods?
- Describe what you see
- Recognition by touch
- Composite words
- Matching faces
Results of describe what you see:
- The right visual field, description matches visual (left hemisphere=language)
- Left visual field, unable to describe but can draw it (right hemisphere)
Results of recognition by touch:
-Able to recognise by touch when the word is shown on left visual field
