Kang Lei , Chen-Zhu Zhao , Fan Li , Shu-Lin Liu , Peng Yang
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Influence of muscle activation on lumbar injury under a specific +Gz load
Purpose
The present study aimed to analyze the influence of muscle activation on lumbar injury under a specific +Gz load.
Methods
A hybrid finite element human body model with detailed lumbar anatomy and lumbar muscle activation capabilities was developed. Using the specific +Gz loading acceleration as input, the kinematic and 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 the occupant's torso, which delayed the contact between the occupant's head and the headrest. Lumbar muscle activation led to higher strain and stress output in the lumbar spine under +Gz load, such as the maximum 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 and reduce the effect of acceleration in vehicle travel direction.
期刊介绍：
Chinese Journal of Traumatology (CJT, ISSN 1008-1275) was launched in 1998 and is a peer-reviewed English journal authorized by Chinese Association of Trauma, Chinese Medical Association. It is multidisciplinary and designed to provide the most current and relevant information for both the clinical and basic research in the field of traumatic medicine. CJT primarily publishes expert forums, original papers, case reports and so on. Topics cover trauma system and management, surgical procedures, acute care, rehabilitation, post-traumatic complications, translational medicine, traffic medicine and other related areas. The journal especially emphasizes clinical application, technique, surgical video, guideline, recommendations for more effective surgical approaches.
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