Rediakina O. Individual anatomical variability of the relationships between the brainstem and intracranial structures in adulthood

The purpose of the study is to establish an individual anatomical variability of the brainstem and its craniotopographic relationship with the surrounding structures of the posterior cranial fossa in adulthood. The dissertation presents theoretical substantiation and a new solution of the individual anatomical variability of the relationship between the brainstem with tentorial foramen and foramen magnum, depending on the structure of the head in people of the mature age. For the first time, the morphometric features of the general parameters of the brainstem and its divisions are given in the dependence from of a structure of a head in men and women of the mature age. Given the complex anatomical position of the brain, it establishes an existing range of variability of its linear dimensions, starting from the tentorial foramen and the foramen magnum. In addition, the natural intervals between the brainstem and the foramen magnum have been established and described, which also has some fixation to justify posterior cranial fossa tumorization and development and their insertion. Thus, in brachycephals (round-headed), conditions for lateral growth of tumors are described due to the severity of the corresponding intervals. Available anatomical conditions (tendency) for tumor tissue growth through more pronounced anterior intervals spacing characteristic of meso- and dolichocephals.