The human brain is a mysterious three-pound organ that controls all functions of the body, interprets information from the outside world, and embodies the mind and soul. Intelligence, creativity, emotion, and memories are a few of the many things governed by the brain. The cerebrum is the largest part of the brain and is divided into right and left hemispheres. Each hemisphere has four lobes: frontal, temporal, parietal, and occipital. The cerebellum is located under the cerebrum. The brainstem acts as a relay center connecting the cerebrum and cerebellum to the spinal cord.