Graziano and colleagues suggested an alternative principle of organization for the primary motor cortex and the caudal part of the premotor cortex, all regions that project directly to the spinal cord and that were included in the Penfield and Woolsey definition of M1.
Cerebral cortex | cerebral cortex | Woronin bodies (arrows) immobilized on the cortex of ''Sordaria fimicola | premotor cortex | Motor cortex | motor cortex | Crash Bandicoot 2: Cortex Strikes Back | Cortex Plus | Cerebral Cortex (journal) | Cerebral Cortex |
Kuniyoshi Sakai proposed, based on several neuroimaging studies, that there may be a "grammar center", where language is primarily processed in the left lateral premotor cortex (located near the pre central sulcus and the inferior frontal sulcus).