Biofidelic neck influences head kinematics of parietal and occipital impacts following short falls in infants.
Biofidelic neck influences head kinematics of parietal and occipital impacts following short falls in infants.
复制标题
生物逼真颈部会影响婴儿跌倒后顶叶和枕骨撞击的头部运动学。
DOI：
10.1016/j.aap.2015.05.020
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Margulies,SusanS
中科院分区：
文献类型：
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作者：
Sullivan,Sarah;Coats,Brittany;Margulies,SusanS
跌倒是儿童头部外伤的主要原因。了解低空坠落期间的头部运动学对于评估受伤风险和设计缓解策略至关重要。通常，这些测量是用商业拟人婴儿替代品进行的，但这些替代品是根据成人生物力学数据设计的。在这项研究中，我们通过结合新的婴儿尸体颈部弯曲和拉伸数据来改进最先进的拟人化测试设备。然后，我们测量头部从 3 个跌落高度跌落到 4 个冲击表面上后的头部运动学，以及枕骨和顶叶头部碰撞位置。改进的婴儿替代品的生物逼真头骨顺应性和颈部特性显着影响了测量的运动学负载，降低了测量的冲击力和峰值角加速度，降低了预期的受伤风险。枕骨和顶骨撞击在主要头部旋转方向以及旋转速度和加速度的大小上表现出不同的运动学响应，随着枕骨撞击后头部反弹，角速度更大。除了跌倒高度之外，对短时跌倒造成的伤害风险的进一步评估还应考虑撞击表面和头部撞击位置。
Falls are a major cause of traumatic head injury in children. Understanding head kinematics during low height falls is essential for evaluating injury risk and designing mitigating strategies. Typically, these measurements are made with commercial anthropomorphic infant surrogates, but these surrogates are designed based on adult biomechanical data. In this study, we improve upon the state-of-the-art anthropomorphic testing devices by incorporating new infant cadaver neck bending and tensile data. We then measure head kinematics following head-first falls onto 4 impact surfaces from 3 fall heights with occipital and parietal head impact locations. The biofidelic skull compliance and neck properties of the improved infant surrogate significantly influenced the measured kinematic loads, decreasing the measured impact force and peak angular accelerations, lowering the expected injury risk. Occipital and parietal impacts exhibited distinct kinematic responses in primary head rotation direction and the magnitude of the rotational velocities and accelerations, with larger angular velocities as the head rebounded after occipital impacts. Further evaluations of injury risk due to short falls should take into account the impact surface and head impact location, in addition to the fall height.