DO WE REALLY USE ONLY 10 PERCENT OF OUR BRAINS?

Do we really use only 10% of our brains?

Psychologists in the early twentieth century commented that humans use only 10 percent of their brains, and Albert Einstein also indicated that humans use only a small portion of the brain. It’s a theory that has been propounded in television documentaries, magazines, advertisements and books over the past century.

Psychics have also latched on to it as a possible explanation for paranormal behavior, attributing unusual incidents to the workings of the unused portion of the brain. They profess that 90 percent of the brain consists of untapped potential that is capable of remarkable feats.

Nearly all scientists now agree that the theory that we use only 10 percent of our total brain function is completely unfounded. In fact, they question how this figure was arrived at in the first place and what areas of the brain are supposed to be redundant. The theory supposes that if 90 percent of the brain were removed, a person would still be able to function normally, whereas in reality it is known that damage to even a small area of the brain can result in physical devastation.

In addition, most significant disorders of the brain involve only a small and very specific area of the brain. If the 10 percent argument was true, it’s unlikely that so many problems would persistently occur in that area. And if we use only 10 percent of our nerves and neurons in the brain, how would this be measured? Indeed, imaging of the brain in scans shows that all parts of the brain are used for different activities and that many areas of the brain are used for some complex activities or thought processes. Throughout the course of one day, most areas of the brain are active at some time, even during sleep. The 10 percent theory suggests that a discrete area of the brain is not used, whereas scans reveal activity throughout the entire brain and not in any isolated segment. The final nail in the 10 percent theory is the fact that neurosurgeons carefully map the brain before removing tumors so that they don’t compromise other essential areas.

From an evolutionary perspective, it’s highly unlikely that our comparatively larger brains would have evolved from our ancestors if the extra areas were surplus to requirements. In fact, there is absolutely no evidence to support the 10 percent theory.