09 Oct 2006 • 1,597 views
The boy has undergone full callosal surgery, the two halves of his brain have been forever seperated from one another. His epileptic seizures have abated and the boy seems to have the same personality and abilities as he had before. But his left brain literally does not know what his right brain is thinking and vice versa.
The researcher, a neuroscientist, has an optical device that makes it possible to flash visual messages in such a way that a message reaches only one hemisphere of the boy's brain. Now the researcher flashes to the boy's right brain the command "walk." The boy accommodatingly pushes his chair back and starts to leave the testing area. The researcher asks the boy why he is doing this. This verbal inquiry is processed by the verbally dominant left hemisphere - the one that didn't get the command and doesn't know why the boy is getting up. But an answer is provided, a perfectly good reason: "Going into my house to get a Coke."
A key player in this is the left brain as INTERPRETER. It is the talker, the explainer, the maker of narrative meaning, the storyteller. And it appears to be quite capable of creating good stories on skimpy resources. It will use ANY MATERIAL available, and fill in the blanks whenever a little imagination is nescessary to make a story hold together.
This is especially noteworthy when we consider that MOST parts of the brain are NOT connected to the outer world, but are connected to other parts of the brain.
(edited from "REALITY ISN'T WHAT IT USED TO BE" by Walter Truett Anderson)