Morphology of the axis in Thais.

ABSTRACT

These metrical and morphological studies of the axis, were based on the axis of 120 Thais, 60 male and 60 female. The measurements included the dimensions of dens, vertebral foramen, anteroposterior and transverse diameter of the axis. All of the dimensions and sexual dimorphism were compared using statistical methods. The results and statistical values of the measurements were illustrated in tabular form. Qualitative observation concerning the shape of dens near the basal regions were reported. In all measurements, the average values of males were greater than those of females. Judging from the statistical analysis, no sex difference was apparent in the mean height of dens and mean diameters of vertebral foramen.