| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Research Abstract |
The aim of this study was to examine micro injuries of brain tissue to gain a better understanding of head injury tolerance.In the animal impact tests due to head jury mechanism, we developed new head rotational impact apparatus of porcine. Compression stress relaxation experiments were conducted in vitro, using porcine brain tissue and subsequently analysed using stain methods. The distribution of the damage ratio of the transverse length to the longitudinal length of brain nerve cells in the brain tissue under loading was also examined. This indicated that at a compression strain of 30% or greater the aspect ratio exceeded 2.0. The results of this study show that a compression strain of 30% corresponds to the threshold for the extreme aspect ratio of 2.0; where the transverse length of deformed nerve cell is two times greater than longitudinal length.
Research involving animal tests was approved by the Ethics Committee of Nihon University with the approval number AP11E003.
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