Specific areas in the brain are responsible for planning, controlling, and performing movements. The premotor cortex is involved in preparation and planning of movements, but it also has a role in controlling movements. The supplementary motor area or SMA plans single movements and sequences of movements and coordinates the left and right sides of the body. The primary motor cortex gives the commands to the muscles to perform movements. Different parts of the primary motor cortex control different muscles. For instance, the muscles of the feet are controlled by the upper parts of the primary motor cortex near the top of the head, while facial muscles are controlled by the lower parts of the primary motor cortex, next to the ear. Generally, "simple" movements, such as picking up a glass, happen in a relatively automatic and unconscious way, meaning that you do not have to concentrate or focus very much to perform simple movements.

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