1. The globe of the earth is divided into two equal portions called hemispheres.

The cerebrum is similar to the globe in that the brain is also divided into two equal portions and these portions are also called hemispheres.2. This rule does not necessarily apply to muscles of the face. An injury to one side of the brain may cause paralysis of either side of the face. In other words, you may see a patient whose left arm and leg are paralyzed and whose facial muscles are paralyzed on either side.
3. Certain deep groove between the folds divide the cerebrum into separate sections called lobes.
4. We can get a clue about location of this lobe from its name too. the frontal lobe is the front of the brain.