Ascending of man caused many correlative changes in human body structure. One of the most significant is cranial base kyphosis - cranial base bending at sphenoid bone. Aim of this research was to precisely measure cranial base parameters and to prove or reject its correlations. The measurements and calculations were performed on standardized series of 46 rentgenograms in L-L projection collected from persons of different age and both sexes. The following are the measured parameters: 1. cranio-sellar index (I) according to the formula I=S/K x 100, where S presents sagital diameter of sella turcica and K presents sagital skull diameter, 2. area of sella turcica (using MATLAB 7.0 software), 3. area of sphenoid sinus (using MATLAB 7.0 software), 4. basal angle. The results were gathered in database and statistically processed. The following allometric equation was applied to the results: y=axk, where y presents the area of sella turcica, x presents sphenoid sinus area, a is a constant and k is growth coefficient. .
