We wrote about the 10% brain myth last month and subsequently we wondered about how these types of myths and rumors come into being. Myths about the brain typically arise in this fashion: An intriguing experimental result generates a plausible if speculative interpretation (a small part of the lobe seems sufficient) that is later overextended or distorted (we use only 10 percent of our brain). The caricature ultimately infiltrates pop culture and takes on a life of its own, quite independent from the facts that spawned it.
Another such myth is the idea that the left and right hemispheres of the brain are fundamentally different. Are you a creative and emotional person? Maybe an artist or a musician? Then you are probably right-brained. No? Perhaps you are a rational, analytical and logical thinker? Maybe a mathematician or an engineer? Then you are most likely left-brained. Who does not know that creativity and emotion are located in the right half of the brain, while rationality and logic are situated in the left half of the brain? Everyone has come across this popular notion of left or right brain dominance, which determines a person’s way of thinking and his/her personality. This notion, however, is a widely held misconception.
Scientists at the University of Utah have debunked the myth with an analysis of more than 1,000 brains. They found no evidence that people preferentially use their left or right brain. All of the study participants — and no doubt the scientists — were using their entire brain equally, throughout the course of the experiment. A paper describing this study appeared in August 2013 in the journal PLOS ONE.
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