An investigation of the interactions between lower-limb bone morphology, limb inertial properties and limb dynamics
An investigation of the interactions between lower-limb bone morphology, limb inertial properties and limb dynamics
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DOI：
10.1016/s0021-9290(03)00076-9
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发表时间：
2003-07-01
影响因子：
2.4
通讯作者：
Stover, S
中科院分区：
文献类型：
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作者：
Dellanini, L;Hawkins, D;Stover, S
骨量和骨尺寸明显影响着野生动物和人类的安全和生存，但骨量和运动动力学之间的相互作用却鲜为人知。采用建模方法来研究骨皮质面积增加导致肢体惯性矩增加、下肢运动最大速度降低以及维持下肢运动次最大运动所需能量增加的假设。使用定制软件和人腿的数字数据来模拟股骨、胫骨和腓骨皮质骨面积增加0%、22%、50%和80%。计算每个骨状态下的肢节质量、质心位置和矢状面惯性矩。进行了空载跑步和自行车运动的运动仿真。线性回归分析用于确定皮质面积对肢体惯性矩、速度和以给定速度移动肢体所需的内功的影响程度。大腿和小腿的惯性矩分别线性增加1.5%和6.9%，皮质面积增加80%，最大无负荷骑行和跑步速度分别下降1.3%和2.0%，骑行和跑步运动的内部功分别增加3.0%和2.9%。这些结果支持了这一假设，尽管运动速度和能量需求的微小变化被观察到，但随着骨骼的进化和变得不那么强壮，这些变化可能在动物的生存中发挥了重要作用。2003爱思唯尔科学有限公司版权所有。
Bone mass and size clearly affect the safety and survival of wild animals as well as human beings, however, little is known about the interactions between bone size and movement dynamics. A modeling approach was used to investigate the hypothesis that increased bone cortical area causes increased limb moments of inertia, decreased lower-limb movement maximum velocities, and increased energy requirements to sustain submaximum lower-limb locomotion movements. Custom software and digital data of a human leg were used to simulate femur, tibia, and fibula cortical bone area increases of 0%, 22%, 50%, and 80%. Limb segment masses, center of mass locations, and moments of inertia in the sagittal plane were calculated for each bone condition. Movement simulations of unloaded running and cycling motions were performed. Linear regression analyses were used to determine the magnitude of the effect cortical area has on limb moment of inertia, velocity, and the internal work required to move the limbs at a given velocity. The thigh and shank moment of inertia increased linearly up to 1.5% and 6.9%, respectively for an 80% increase in cortical area resulting in 1.3% and 2.0% decreases in maximum unloaded cycling and running velocities, respectively, and in 3.0% and 2.9% increases in internal work for the cycling and running motions, respectively. These results support the hypothesis and though small changes in movement speed and energy demands were observed, such changes may have played an important role in animal survival as bones evolved and became less robust. (C) 2003 Elsevier Science Ltd. All rights reserved.