The Divided Brain and the Search for Meaning

by Iain McGilchrist

Let me begin to sum up, before making some concluding remarks about where we are now. It used to be said, according to the popular cliché, that though the left hemisphere might lack charm, it was solid, down to earth, realistic and a sure path to the truth. But this is not at all the case. The left hemisphere is not in touch with the world. It is demonstrably self-deceiving, and confabulates – makes up a story, when it cannot understand something, and tells it with conviction. Michael Gazzaniga first demonstrated this in split-brain patients. Subsequent research shows that, unlike the right hemisphere, which tends toward self-doubt, it takes a distinctly flattering view of its own capabilities. And when, as in the case of a paralysed limb, it is confronted with evidence that all is not well, it refuses to recognise the problem. If forced to do so, it disowns it – won't take responsibility: the paralysed limb belongs to the person in the next bed.