The cerebrum (right and left) is the upper, front portion of the brain and consists of two hemispheres, or halves. The two hemispheres are connected by the corpus callosum, which is a large bundle of nerve fibers. The cerebrum can be divided into four lobes: frontal lobe, parietal lobe, occipital lobe, and temporal lobe.

The cerebrum is the largest portion of the brain. It oversees many everyday activities. These include motor function, cognitive abilities (thinking and reasoning), sensory impulse interpretation, speech and language, bowel and bladder control, sexual desire, and emotional control.

The commonly-used terms 'left brained' and 'right brained' refer to the two hemispheres of the cerebrum. While both sides of the cerebrum (right and left) are involved in all the activities listed above, brain research shows that the left side of the cerebrum is used more for language and logical processing, while the right side is more for visual and intuitive processing. This explains why those who experience damage to a portion of the brain, such as from a stroke, experience such a wide variety of impairments, depending on the location and severity of damage.