Abstract
The purpose of this study is to examine the influence of the brain shape and structure on the strain distribution by comparing the distribution of the two differently-shaped head physical models in rotational impact. One of the brain model used in this study was shaped actual human brain including the cerebral sulci, gyri and ventricles. The other was simple-shaped model removed those structures. Each model was exposed to angular acceleration by impactor collision causing 4500rad/s^2 peak rotational acceleration with 8ms pulse duration. After rotating 60 degree, two models were decelerated with 1500 rad/s^2 peak, 30ms duration. As the results of experiments, the maximum principal strain at the corpus callosum in real-shaped model was larger than the simple-shaped model. And the concentrations in base of the sulci were also observed in the real-shaped model. Therefore it was clarified that the brain shape such as the cerebral sulci and corpus callosum affect the strain distribution.
