- from Brain
The thinking brain is the cerebrum, which looks mostly the same all over. It resembles a bowl of squishy, wrinkled gray gelatin.
Actually, it looks like two bowls. Humans have two brains, one on each side of the head. The right cerebrum and the left cerebrum are mirror images of each other, connected by a thin cord.
Two brains are better than one. If you had to stuff and seal a million envelopes, wouldn’t it be faster if you stuffed them and a friend sealed them? Each person would focus on only one task, but you’d work together to get the job done. The right and left brains work the same way. The right brain controls the left side of your body, and the left brain controls the right side. Each brain may look like a mirror image of the other, but they control different activities. The illustration below shows which side of the brain handles tasks in most people. But not everyone is the same.