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Effects of Brain Mechanical Properties on Child Head Responses under Linear Load
Shihai Cui,Yue Chen,Haiyan Li,Lijuan He,Shijie Ruan 대한의용생체공학회 2016 Biomedical Engineering Letters (BMEL) Vol.6 No.2
Purpose It is usually difficult to obtain the accurate mechanicalproperties of pediatric brain and skull because of the absenceof pediatric cadaver experiments. The goal of this work is todiscuss how different brain mechanical properties influencepediatric head response. Methods A validated finite element model of a 3-year-oldchild head with detailed anatomical structures was used toparametrically investigate the effects of mechanical propertieson child head. Taguchi orthogonal method was adopted todecrease the numbers of the simulation under direct impactload. Results With the increase of the skull elastic modulus, thecoup pressure decreases significantly (P < 0.001) whereasthe contrecoup pressure (P < 0.001) and maximum vonMises stress of skull (P < 0.001) increase significantly. Withthe increase of the short-time shear modulus of brain tissue,maximum shear stress of brain tissue (P < 0.001) increasessignificantly whereas the maximum principal strain (P < 0.01)decreases significantly. Conclusions Both Elastic modulus of skull and linearviscoelastic material parameters of brain tissues have statisticallysignificant effects on impact responses of child head. Differentmaterial parameters can lead to a great difference on impactresponses of child head.
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