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首页> 外文期刊>Journal of orthopaedic research >Locomotor skills and balance strategies in children with internal rotations of the lower limbs.
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Locomotor skills and balance strategies in children with internal rotations of the lower limbs.

机译：下肢内旋的儿童的运动技能和平衡策略。

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摘要

The purpose of this study was to investigate the functional effects of a structural deformation, internal rotations (IR) of the lower limbs, on upper body balance strategies used during locomotion in 5-6 year-old and 7-10 year-old children. Balance control was examined in terms of rotation around the longitudinal axis in horizontal plane (yaw) and around the sagittal axis in a frontal plane (roll). Kinematics of foot, pelvis, shoulder, and head rotations were measured with an automatic optical TV image processor and used to calculate angular dispersions and segmental stabilizations. Older children with IR showed a lower gait velocity, particularly in difficult balance conditions than typically developing (TD) children. In younger children, the effect of the local biomechanical deficit remained limited to the lower limbs and did not affect upper body coordination. By contrast, in older children with IR, the development of head stabilization in space was affected. This was demonstrated by an "en bloc" instead of an articulated mode of head-trunk unit systematically adopted by the control group. As pelvic stabilization remains the main reference frame to organize balance control in older children with IR, we conclude that the structural deformity of the legs affect and possibly delay the acquisition of the head stabilization in space strategy.
机译：这项研究的目的是调查5-6岁和7-10岁儿童在运动过程中使用的下肢结构变形，内旋（IR）对上身平衡策略的功能影响。通过围绕水平面中的纵轴（偏航）和围绕前额平面中的矢状轴（滚动）的旋转来检查平衡控制。用自动光学电视图像处理器测量脚，骨盆，肩膀和头部旋转的运动学，并用于计算角度离散和分段稳定性。年龄较大的IR儿童表现出较低的步态速度，尤其是在困难的平衡条件下，比典型的发展中（TD）儿童要低。在年幼的儿童中，局部生物力学缺陷的影响仅限于下肢，并且不影响上身的协调性。相比之下，在患有IR的年龄较大的儿童中，空间头部稳定的发展受到了影响。这是通过“整体”而不是对照组系统地采用的铰接式头车单元的模式来证明的。由于骨盆稳定仍然是IR年龄较大的儿童组织平衡控制的主要参考框架，因此我们得出结论，腿部的结构变形会影响并有可能延迟在空间策略中获得头部稳定的能力。

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