Frontal lobe
The frontal lobes takes action based on sensory information (sight, sound, touch) from the three rear areas of the cerebrum. The action is moderated by the influence of the pre-frontal cortex. The system is a delicate balance between the need to satisfy urges from the most ancient parts of the brain, such as hunger, self-defence and sex, with the need to act in a way which is socially acceptable.