Knee pivot location in asymptomatic older adults.
Knee pivot location in asymptomatic older adults.
复制标题
无症状老年人的膝关节枢轴位置。
DOI：
10.1016/j.jbiomech.2023.111487
复制
发表时间：
2023
影响因子：
2.4
通讯作者：
Rullkoetter,PaulJ
中科院分区：
文献类型：
--
作者：
Hamilton,LandonD;Andreassen,ThorE;Myers,CaseyA;Shelburne,KevinB;Clary,ChaddW;Rullkoetter,PaulJ
在研究膝关节功能在整个生命周期中的变化时，无症状、自然膝关节运动学的代表性数据非常重要。高速立体X线摄影（HSSR）提供了膝关节运动学的可靠测量，平移<1 mm和旋转1°，但研究通常具有有限的统计能力来进行组间比较或测量个体变异性的贡献。本研究的目的是检查体内髁运动学，以量化屈曲范围内的横向旋转中心或枢轴位置，并挑战无症状膝关节运动学中的内侧枢轴范例。我们对53名中老年人（27名男性; 26名女性：50.8 ± 7.0岁，1.75 ± 0.1 m，79.1 ± 15.4 kg）在仰卧压腿、膝关节伸展、站立弓步和步态过程中的枢轴位置进行了量化。对于所有活动，确定了中心至内侧枢轴位置，膝关节屈曲增加与旋转中心的后平移相关。膝关节角度和前后旋转中心位置之间的关联不如内外侧和前后位置之间的关联那么强，不包括步态。膝关节角度与旋转中心前后位置的Pearson相关性（P< 0.001）强于膝关节角度与旋转中心前后位置的Pearson相关性（P= 0.0122）。个体变异性在旋转中心位置解释的方差中占可测量的比例。步态特有的是，旋转中心位置的侧向平移导致膝关节屈曲<10°时旋转中心的前向平移。此外，垂直地面反作用力和旋转中心之间没有关联。
Representative data of asymptomatic, native-knee kinematics is important when studying changes in knee function across the lifespan. High-speed stereo radiography (HSSR) provides a reliable measure of knee kinematics to <1 mm of translation and 1° of rotation, but studies often have limited statistical power to make comparisons between groups or measure the contribution of individual variability. The purpose of this study is to examine in vivo condylar kinematics to quantify the transverse center-of-rotation, or pivot, location across the flexion range and challenge the medial-pivot paradigm in asymptomatic knee kinematics. We quantified the pivot location during supine leg press, knee extension, standing lunge, and gait for 53 middle-aged and older adults (27 men; 26 women: 50.8 ± 7.0 yrs, 1.75 ± 0.1 m, 79.1 ± 15.4 kg). A central- to medial-pivot location was identified for all activities with increased knee flexion associated with posterior translation of the center-of-rotation. The association between knee angle and anterior-posterior center-of-rotation location was not as strong as the relation between medial–lateral and anterior-posterior location, excluding gait. The Pearson’s correlation for gait was stronger between knee angle and anterior-posterior center-of-rotation location (P< 0.001) than medial–lateral and anterior-posterior location (P= 0.0122). Individual variability accounted for a measurable proportion in variance explained of center-of-rotation location. Unique to gait, the lateral translation of center-of-rotation location resulted in the anterior translation of center-of-rotation at <10° knee flexion. Furthermore, no association between vertical ground-reaction force and center-of-rotation was identified.