The largest section of the brain. It is located in the upper portion and is the area that possesses our thoughts, judgment, memory, and association skills, and the ability to discriminate between items. The outer layer of the cerebrum is the cerebral cortex, which is composed of folds of gray matter. The elevated portions of the cerebrum, or convolutions, are called gyn and are separated by fissures or sulci. The cerebrum has both a left and right division or hemisphere. Each hemisphere has four lobes: frontal, parietal, occipital, and temporal.