primary motor cortex
Acronym:
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 premotor 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 the premotor cortex, which is known as 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 area


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