# Precentral Sulcus

National Cancer Institute

## Source

National Cancer Institute. *Precentral Sulcus*. NCI Thesaurus. Code C33394.

A long groove or furrow, located on the lateral surface of the frontal lobe of the brain, anterior and parallel to the central sulcus, and forming the rostral limit of the precentral gyrus; it is usually divided into a superior and an inferior segment and serves as a primary motor area of the brain.