Localization of the precentral gyrus in the computed tomogram and its clinical application.

In 30 patients the anatomical configurations of the precentral and central sulcus and gyrus were examined by computed tomography and could be determined with great accuracy. The distances between the coronal suture and the central and precentral fissure, and the angle between the longitudinal fissure and the central fissure were measured. These data are used in the precise localization for a surgical approach to a mass lesion.