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Transcripción

HOW

WHY

WHEn

Split-Brain

Experiments

Zara Clark

WHAT

split-brain experiments involve partially splitting the corpus callosum

What is the corpus callosum

the corpus callosum

The corpus callosum is responsible for making the two sides of the brain communicate.

Lower nerve fibers remain intact after the split-brain experiment, so some motor and sensory information can be exchanged.

Michael gazzinga and roger sperry

who

Were the two first, and main, split-brain experimenters

the experiment

Gazzinga and Sperry

Split-Brain

Showed participants objects in each visual field for a split second and then asked them to either say, draw or point to the object they saw.

example

results:

IQ

Retina, visual field and brain hemisphere relationships

The right visual field receives information from the left retina, and transfers it to the left hemisphere

right visual field

The left visual field receives information from the right retina, and transfers it to the right hemisphere

left visual field

RESULTS:

Hemisphere Abilities

learn

when information was received in the left hemisphere

left

Participants could say what the object was, could draw it and could select the object all with their right hand

WHen information was received in the right hemisphere

right

Participants could not name what they saw, but could draw and select the object with their left hand

(proving there is no language centre in the right hemisphere)

Split-Brain Experiments Now

ideas

Sperry continued to study split-brain until his passing in 1994 and Gazzinga continues to study split-brain.

It is otherwise not widely encouraged.

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