Age, sexual, individual and combined variability of the angle of connection of vertebral arteries and angle of bifurcation of the basilar artery

For the purpose of the analysis of the age, sexual, individual and combined variability of the angle of connection (AC) of vertebrata and the angle of bifurcation (AB) of a basilar artery, 68 preparations of a brain from corpses of adults have been studied. Electronic photos of these preparations imported to the application computer program “Micrografx Designer 9,0” where they measured size AB basilar and AC of vertebral arteries. Research has shown that the size of these corners has no significant sexual distinctions. AC of vertebral arteries can be narrow, average and wide; bifurcation basilar artery can happen under a narrow, average and wide corner. Age of owners of a narrow and wide AB, and also the corners of the same name AC of vertebral arteries have no statistically significant distinctions. In extreme groups of variability the bigger representation of males is noted. At people of advanced age size AB statistically significantly for 16%, and the size AC 17% more, than at people in the 1-st period of mature age. Increase in size of the studied corners happens with age gradually therefore significant distinctions between adjacent age groups aren’t revealed. The combined variability of angular parameters of intra cranial arteries of vertebrobasilar system has allowed to distinguish 8 options of geometry of these arteries.