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《Journal of Medical Biomechanics》 2012-04
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Effect of helmet mass and mass center on neck muscle strength in military pilots

JIA Xiao-hong1,MAO Jun-bing1,WANG Ren-cheng1,PU Fang2,SUN Fang3(1.Division of Intelligent and Biomechanical System,State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China;2.School of Biological Science and Medical Engineering,Beihang University,Beijing 100191,China;3.Applications and Computation Service Center of CMVHuman,Shanghai 200030,China)  
Objective To investigate the effect from helmet mass and deviation of mass center on neck muscle activity in military pilots.Methods Based on AnyBody software platform,a musculoskeletal model of head neck complex was established including C0,C1-C7,T1 and 136 muscles.Concentrated loads were applied to simulate the role of helmet.Strength from seven main muscle groups under different helmet mass,mass center and +Gz acceleration loads were simulated and calculated.Results When mass center of the helmet and the head coincided with each other,the muscle groups(such as semispinalis,levator scapulae,splenius capitis and cervicis) which took charge of extension were activated.Muscle strength increased with helmet mass linearly and +Gz acceleration loads would make this increase multiplied.Flexion muscle began to work when mass center of the helmet moved backward,so did the lateral bending muscles when mass center of helmet moved in the right-and-left direction.Conclusions Helmet mass and its center have an obvious influence on neck muscle activity in military pilots.The musculoskeletal model established in this paper can be used to calculate the change in muscle strength under different situations and conduct a quantitative analysis for helmet design and validation.
【Fund】: 国家自然科学基金资助项目(50975151);; 摩擦学国家重点实验室自主研究项目(SKLT10B03)
【CateGory Index】: R85
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【Co-citations】
Chinese Journal Full-text Database 3 Hits
1 CHEN Qiong,SHEN Si-yun,XIA Ling,LI Jiao-jie,CHEN Xiao-ping,CHEN Xiao-jian,XU Jian-hua.Air force Hangzhou Aviation Medicine Assessment and Training Center,Hangzhou,Zhejiang 310007,China;Research on neck muscular strength in military pilots and the effects of muscle strength training[J];Military Medical Journal of Southeast China;2012-01
2 LI Han-jun1,LIU Hui1,ZHANG Xin1,YU Bing2(1.Beijing Sport University,Beijing 100084,China;2.University of North Carolina at Chaple Hill,North Carolina 27599,USA);Development of Estimation of the Muscle Force Distribution of Joint[J];Journal of Beijing Sport University;2013-07
3 LI Xu-hong1,2,HAO Wei-ya3,YU Jia-bin4,WU Cheng-liang5 1.Shanghai University of Sport,Shanghai 200438,China;2.Zhejiang Research Institute of Sport Science,Hangzhou 310004,China;3.China Institute of Sport Science,Beijing 100061,China;4.Beijing Sport University,Beijing 100084,China;5.Chongqing Three Gorges University,Chongqing 404100,China;Computer Simulation of Kinetics Relationship between Gymnast and Landing Mat in Vault Based on LifeMod[J];China Sport Science;2013-03
【Co-references】
Chinese Journal Full-text Database 5 Hits
1 Zeng Qingxin Zhuang Damin (School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China);Target identification of different task weight under multi-interface and multi-task[J];Journal of Beijing University of Aeronautics and Astronautics;2006-05
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4 ZHI Xin-wei1 (1. Zhengzhou Broadcasting School,Henan Zhengzhou 450002;2.Southeast University,Jiangsu Nanjing 210096);The Study of Visual Seeing Resolving Power and Image Display Size[J];CD Technology;2008-05
5 GENG Cong CHEN Hai-qing ( School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China );Testing System Design of Helmet-Mounted Display[J];Optics & Optoelectronic Technology;2007-04
【Secondary Citations】
Chinese Journal Full-text Database 1 Hits
1 AI Kang-wei~1,LI Fang-xiang~2,HAO Wei-ya~1,YUAN Ting-gang~11.National Research Institute of Sport Science,Beijing 100061,China;2.National Research Institute of Sports Medicine,Beijing 100061,China.;Kinematical Comparison and Analysis between Snatch and Clean in Weightlifting[J];China Sport Science;2005-07
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