Influence of muscle activation on lumbar injury under a specific+Gz load  

作　　者：Kang Lei Chen-Zhu Zhao Fan Li Shu-Lin Liu Peng Yang 

机构地区：[1]State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha,410082,China [2]Naval Medical Center,The Secondary Military Medical University,Shanghai,200433,China [3]Department of Orthopedics,Naval Medical Center of PLA,Shanghai,200433,China

出　　处：《Chinese Journal of Traumatology》2024年第4期218-225,共8页中华创伤杂志（英文版）

基　　金：The project was supported by the National Natural ScienceFoundation(51205117);PLA Naval Medical Center(No.20M0207).

摘　　要：Purpose:The present study aimed to analyze the influence of muscle activation on lumbar injury under aspecific+Gz load.Methods:A hybrid finite element human body model with detailed lumbar anatomy and lumbar muscleactivation capabilities was developed.Using the specific+Gz loading acceleration as input,the kinematicand biomechanical responses of the occupant's lower back were studied for both activated and deactivated states of the lumbar muscles.Results:The results indicated that activating the major lumbar muscles enhanced the stability of theoccupant's torso,which delayed the contact between the occupant's head and the headrest.Lumbarmuscle activation led to higher strain and stress output in the lumbar spine under+Gz load,such as themaximum Von Mises stress of the vertebrae and intervertebral discs increased by 177.9%and 161.8%,respectively,and the damage response index increased by 84.5%.Conclusion:In both simulations,the occupant's risk of lumbar injury does not exceed 10%probability.Therefore,the activation of muscles could provide good protection for maintaining the lumbar spine andreduce the effect of acceleration in vehicle travel direction.

关 键 词：Lumbar muscles Finite element analysis BIOMECHANICS +Gz load Injury mechanisms 

分 类 号：R681.5[医药卫生—骨科学]