804 Experiment study for mechanical properties of white/gray matter

Abstract

Human finite element model is a practical tool that predicts traumatic injury. This research measured the viscoelastic properties of white matter and gray matter by shear, impact and relaxation testing in order to improve a human model. As results, the dynamic modulus of porcine brain and liver was found to increase with frequency. In addition, gray matter was found to be stiffer than white matter over the frequency range of 55-90Hz.On the other hand, white matter was found to be stiffer than gray matter in impact and relaxation testing. These results show anisotropic behavior of white matter concerned in complex mechanical properties of brain.