What Side of the Brain Are You Using Today?

It is said that one side of your brain is more supreme. But is that really true?


Roger W. Sperry’s experiment on the cat with epilepsy impacted the way we see experiments with animals. (Photo Courtesy of Adalie Landa)

Adalie Landa, Staff Writer

Over the past few years, people have wondered whether or not is it true that you have a more dominant side of the brain? How does that affect the way you think in school? Roger W. Sperry experimented on people with epilepsy and disconnected the corpus callosum which connects the right hemisphere from the left hemisphere of the brain. As Dina A. Lienhard this operation led to the discovery that the “hemispheres in human brains ha[ve] different functions”. Because researchers like him did not know which functions were supposed to belong to which hemisphere, he continued to conduct experiments on animals to further validate his findings.

 Sperry knew that the right hemisphere controls the opposite side of the body and vice versa, but he wanted to look specifically at how this affected his test subjects. He disconnected the corpus callosum on a cat that had epilepsy and after the surgery, he showed the cat certain patterns while covering one eye, and then leaving both eyes open. He found out that the cat only remembered certain patterns when one of its eyes was open. With this discovery, he also found out that the cat did not recognize any events with both eyes open. Both hemispheres acted as if they were the only brain. This concluded that both hemispheres need each other in order to function properly. Even Harvard Medical School states that, “If you performed a CT scan, MRI scan, or even an autopsy on the brain of a mathematician and compared it to the brain of an artist, it’s unlikely you’d find much difference”. So while others may perform well in the arts or more in math, and there is a division of brain functioning, no evidence is yet to prove that everyone is separated into two categories of right-brained and left-brained people.