I believe the answer is: Frontal lobe
If frontal lobe is compared to a machine, it's function would be similar to the 'control panel' of our brain that drive how we communicate and how our personality is formed. It's also serve as a control panel that play the most crucial role in active/conscious motor function.
The frontal lobe is the part of the cerebral cortex that deals with abstract thinking, planning, executive control, and judgment, the qualities that make us most human.
