primary motor cortex
Acronym: SMC
The term primary motor cortex refers to a part of the cerebral cortex defined by internal structure, connectivity and function ( Matelli-2004 ). It is one of two kinds of motor cortex, the other being secondary motor cortex. In primates it is located in the part of the precentral gyrus nearest the central sulcus, the posterior boundary of the frontal lobe. In the human it is identified with area 4 of Brodmann (human) and the adjacent, caudal portion of area 6 of Brodmann (human) ( Zilles-2004 ). In the macaque it is identified with area 4 of Brodmann (guenon) and area 6a alpha of Vogts ( Woolsey-1952 ). In the rat ( Swanson-2004 ) and mouse ( Hof-2000 ) it lies lateral to secondary motor cortex. In the rodent it extends from the frontal pole about half way to the occipital pole. See also area MI of Woolsey.

Also known as: area F1, motor strip, precentral motor area, precentral motor cortex, primary motor area, primary somatomotor areaNeuroNames ID : 1910

Species Having or Lacking this Structure

All Names & Sources

Internal Structure

Cells Found There

Genes Expressed There

Locus in Brain Hierarchy


Models Where It Appears

Publications About It

BrainInfo                           Copyright 1991-present                          University of Washington