Objective - to study the width of the precentral gyrus of mesocephalic males using X-ray computed tomography (CT). Materials and methods. An analysis of the results of CT studies was performed using the scans obtained from 55 mesocranial mesocephalic right-handed males aged between 22 and 35 years without the history of diseases and traumatic injuries of the central and peripheral nervous system. The width of the precentral gyrus was measured in three regions: above the superior temporal gyrus, at the middle frontal gyrus level, and above the cingulate gyrus. Results. The precentral gyrus was found to reach the maximum width in the region above the superior temporal gyrus. The minimal width was detected above the cingulate gyrus. Conclusions. The comparative study of the precentral gyrus width detected statistically insignificant differences between the hemispheres with a tendency for the reduction of all the parameters in the right hemisphere as compared to the left one.