The cerebrum, or cerebral
cortex, is divided into two hemispheres (left and right). Each
hemisphere consists of four sections,
called lobes:
Occipital Lobe, Temporal Lobe, Parietal Lobe and the Frontal Lobe. The answer to your question is the Frontal Lobe which is located under
the forehead. The frontal lobe
controls reasoning, planning,
voluntary movement, and some
aspects of speech. The prefrontal
cortex is the part of the frontal
lobe right behind the forehead.
It is associated with complex
cognitive skills such as being
able to differentiate among
conflicting thoughts, determine
good and bad, identify future
consequences of current activities.