次世代頭部ダミーにおける頭蓋内脳挙動の直接評価法の開発

抄録

Acute subdural hematoma (ASDH) is a type of head injury which occurs frequently in the traffic accidents. Although ASDH can be caused by the rupture of the bridging vein induced by the rotational head motion, the detail mechanism has not been clear yet. Therefore, to clarify the mechanism, various studies were conducted by using the simulation and the physical models. In the previous study we carried out, the physical model with the intracranial structure was developed as a novel anthropometric test dummy (ATD) head, however, there is still a challenge in the measurement method of the intracranial brain motion which uses multiple high speed cameras. For the practical application of the new ATD head, it is required to improve the measurement method. In this study, direct evaluation method of the intracranial brain motion without high-speed cameras was developed. A 6DOF motion sensor was implanted in the brain model and the intracranial brain motion were calculated by using Rodrigues' rotation formula. For the validation of this method, the occipital impact experiment was carried out and followed by the sled test for the evaluation under the traffic accident condition. The results showed that the risk of ASDH can be evaluated by relative motion between the skull and brain of the ATD head calculated by using the developed method.