Brodmann Area 6, Lateral View

Description

Brodmann area 6 occupies a broad band of premotor cortex along the posterior frontal lobe in this lateral view of the human brain. The field lies anterior to the precentral gyrus (primary motor cortex, Brodmann area 4) and is bounded posteriorly by the precentral sulcus and the central sulcus, with its superior portion extending toward the superior frontal gyrus. Inferiorly, area 6 approaches the lateral fissure (Sylvian fissure) near the ventral premotor region, while its medial continuation as the supplementary motor area is implied but not directly visible from the lateral perspective. Sulcal and gyral relief is used to anchor localization across the posterior parts of the superior and middle frontal gyri. Area 6 matters when you need to separate motor execution from motor planning at the bedside and in the operating room. Lesions involving the dominant premotor cortex can present with ideomotor apraxia, whereas focal tumors or cortical dysplasia in this region often generate frontal lobe seizures with contralateral tonic posturing or complex motor automatisms that can be mistaken for primary motor strip involvement. The fixed lateral perspective supports surgical planning and teaching by keeping the relationship between area 6, the precentral gyrus, and key sulci unambiguous. Small mislocalizations matter. Neuroanatomy instructors can place this illustration alongside functional maps of the motor homunculus to teach the transition from premotor cortex to primary motor cortex, and neurosurgeons can pair it with awake mapping notes when documenting resection margins near the precentral sulcus. It also fits well in neurology and rehabilitation materials discussing apraxia, stroke syndromes of the superior division of the middle cerebral artery, and the clinical logic of transcranial magnetic stimulation targets over lateral premotor cortex. Anatomical accuracy verified by SciePro's Medical Advisory Board.