Bonnet Cédrick T, Cherraf Sarah, Do Manh-Cuong
Laboratoire de Neurosciences Fonctionnelles et Pathologies, Universities of Lille, CNRS, Lille, France.
Laboratoire de Neurosciences Fonctionnelles et Pathologies, Universities of Lille, CNRS, Lille, France.
Hum Mov Sci. 2014 Jun;35:94-103. doi: 10.1016/j.humov.2014.03.007. Epub 2014 Apr 18.
In 1996, Winter and colleagues proposed the existence of two postural control mechanisms in both the anteroposterior and mediolateral axes: a bodyweight (loading/unloading) distribution mechanism and a complementary center of pressure location mechanism. To measure the loading/unloading forces under each foot, the feet had to be placed side by side in the mediolateral axis and one foot ahead of the other in the anteroposterior axis. Our first objective was to reexamine the validity of anteroposterior data published with the feet side by side. In that foot condition, we expected no change in the anteroposterior loading/unloading forces (regardless of the task performed), and consequently no change in the complementary mechanism. Our second objective was to confirm our hypotheses with experimental data. Twelve healthy, young adults performed three types of body oscillation in the anteroposterior axis (at the hips, at the ankles and alternately at the ankles and hips) and a quiet stance condition with the feet side by side. As expected, the bodyweight mechanism did not vary significantly. Although the complementary mechanism was significantly higher in the ankle and alternating conditions, the change was very tiny (<0.3%). Thus, we propose methodological requirements to analyze both mechanisms.
1996年，温特及其同事提出，在前后轴和内外侧轴上存在两种姿势控制机制：体重（加载/卸载）分布机制和互补的压力中心定位机制。为了测量每只脚下的加载/卸载力，双脚必须在内外侧轴上并排摆放，在前后轴上一只脚在另一只脚前方。我们的首要目标是重新审视双脚并排时所公布的前后数据的有效性。在那种脚部状态下，我们预计前后加载/卸载力不会发生变化（无论执行何种任务），因此互补机制也不会发生变化。我们的第二个目标是用实验数据来证实我们的假设。12名健康的年轻成年人在前后轴上进行了三种类型的身体摆动（在臀部、在脚踝以及脚踝和臀部交替进行），以及双脚并排的安静站立状态。正如预期的那样，体重机制没有显著变化。尽管在脚踝和交替状态下互补机制明显更高，但变化非常微小（<0.3%）。因此，我们提出了分析这两种机制的方法要求。
