BASILAR ARTERY OF THE HUMAN EMBRYO: THE BEGINNING OF FORMATION

In order to study the features of the development of the basilar artery, the authors analyzed 4 series of sagittal sections and 2 series of frontal sections of human embryos from 21 mm to 27 mm crown-rump length. The primary basilar artery is detected at 7 weeks of fetal development. It turned out that in embryos of 7–8 weeks of human prenatal ontogenesis, the arteries already vascularize the brain well, and the arterial bed of the human brain can be ready for functioning. The data obtained indicate the emergence of the irrigation system of the basilar artery at the age of 8 weeks of intrauterine development in humans. The analyzed stages of embryos are assumed as a kind of spurt for the development of the arterial system of the human brain and determine the need for further fundamental longitudinal study of human embryogenesis.