The frontal lobe of the brain's precentral gyrus contains the primary motor cortex.
The cortex's primary function is to send signals that regulate how the body moves. It belongs to the frontal lobe and is located before the central sulcus.
An additional feature of this area is a motor homunculus, which is an inverted image of the other half of the body. Therefore, the upper half of the motor cortex stimulates leg movements, whereas the bottom section of the motor cortex stimulates facial motions.
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