hemispheric lateralisation Flashcards
hemispheric lateralisation
2 halfs of brain are functionally different and certain behaviours are controlled by one hemisphere rather than the other
connected by corpus callosum
right side of brain
processes info from and control outputs in the left half of body
left side of brain
processes info from and controls outputs in the right half of body
split brain research
refers to damage to the corpus callosum causing disruption to the communication between the two hemispheres
separation sometimes medically induced in order to combat the effects of serve drug resilient epliepsy.
sperry
compared 11 split brain patients results to patients with no hemisphere to separation where the info from one visual field could be shared with the other hemisphere
sperry procedure- describe what u see
pictured was presented to either the left or right visual field and participants had to describe what they say
findings: right visual field they could easily describe what they see. The left visual field, could not describe it, often reported there was nothing there
sperry procedure- tactical test
object place in each hand and had to describe what they felt or had to select simular objects from a series of alternate objects
findings: right hand could describe what they felt. left hand, could not describe.
sperry procedure- drawing task
presented with a picture in either their left or right visual field and had to draw what they saw
findings: right visual field picture was drawn not as clear. left visual field consistently drawing more consisted and clearer picture.
evaluation of sperry
controlled conditions, lack of ecological validity (in real life participents can move so both hemispheres get info), seizures or surgery could alter brain
sample of 11 patients, cant generalise