A thin band of cells on the posterior portion of the precentral gyrus. It forms a parallel band just anterior to primary motor cortex, and the supplementary motor area occupies the central portion of the premotor cortex, along the midline surface of both hemispheres.

Area of the FRONTAL LOBE concerned with primary motor control located in the dorsal PRECENTRAL GYRUS immediately anterior to the central sulcus. It is comprised of three areas: the primary motor cortex located on the anterior paracentral lobule on the medial surface of the brain; the premotor cortex located anterior to the primary motor cortex; and the supplementary motor area located on the midline surface of the hemisphere anterior to the primary motor cortex.

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