The Cerebrum
The cerebrum is split into 2 hemispheres by a deep fissure. The twin hemispheres communicate with each other through a thick tract of over 200 million nerve fibers, called corpus callosum, that lies at the base of this fissure.
The surface of the cerebrum and the cerebellum is coated with a vital 6-layers of tissue, about a thumb thick. It is called the cortex, from the Latin word for bark. Most of the information processing takes place in this cerebral cortex.
The folds in the brains add to their surface area and therefore increase the amount of grey matter and the quantity of information that can be processed.
Our ability to form words & numbers and reason logically seems to lie primarily in the left hemisphere, while the right hemisphere largely controls our creative skills.
Nearly all of the signals from the brain to the body and vice-versa cross over on their way to and from the brain. The right cerebral hemisphere primarily controls the body’s left side. The left hemisphere the right side.
