Anatomy and function
The precentral gyrus contains an important part of the primary motor cortex and contributes to voluntary movement of the opposite side of the body. Planning and executing movement also involves premotor, supplementary motor and subcortical circuits.
Where to look in the model
Both precentral gyri are highlighted as an anatomical reference for the motor system.
What this view does not establish
The entire precentral gyrus is not an exact M1 boundary. A body-part somatotopic map is not shown.
Open in 3DSources and precision
Cortex uses the FreeSurfer fsaverage5 template surface, with 10,242 vertices per hemisphere. Functional references use selected Destrieux sulcal and gyral parcels. Deep structures use fsaverage aseg segmentations. The Sereno2020 cerebellar research surface preserves folial geometry, but comes from another specimen; its assembled placement is schematic, without medical registration across templates. Arterial paths are manually drawn teaching schematics, not CTA/MRA reconstructions.
An educational schematic prototype for understanding spatial relationships. Item-by-item independent neuroanatomical review is pending. Functional highlights are not results of an individual examination and do not support individual diagnosis or treatment decisions.