DYNAMIC CHARACTERISTICS OF THE HUMAN SKULL-BRAIN SYSTEM

In this work, the dynamic characteristics of the human skull-brain sys tem are studied. For the purpose of our analysis, we adopted a model c onsisted of a hollow sphere (skull), an inviscid and irrotational flui d (cerebrospinal fluid), and a concentrically located inner elastic sp here (brain). The mathematical analysis is based on the elasticity sol ution for the elastic spheres and the simplified description of the mo tion of the fluid by the wave equation. The roots of the characteristi c equation were found numerically. The results are in agreement with o ther researchers analogous modelling work, however our three-dimension al analysis introduces a new pattern of frequencies to the natural fre quencies spectra of the skull-brain system. The results are compared w ith experimental ones and the role of the various system parameters on the natural frequencies is investigated.