Perhaps most striking is a brain that has both the left and right hemispheres intact but has the 200 million axons[36] between them—the corpus callosum—cut due to a medical problem. Michael Gazzaniga (born 1939) has studied these cases where both brains operate but have no means to communicate between them.[37] Through a series of experiments in which he fed a word to only a patient’s right brain, he found that the left hemisphere, which was not aware of the word, nonetheless felt responsibility for choices based on this information, even though the choice was actually made by the other
...more
