Genthon Nicolas, Gissot Anne-Sophie, Froger Jérôme, Rougier Patrice, Pérennou Dominic
Stroke. 2008 Feb;39(2):489. doi: 10.1161/STROKEAHA.107.493478. Epub 2008 Jan 3.
Posturography in patients with stroke is widely based on the use of a single force platform and the weightbearing asymmetry quantified from the lateral shift of the center of pressure toward the sound leg. Because the percentage of body weight on each side is a more concrete variable, the present study analyzed the possibility of inferring percentage of body weight from center of pressure.
Forty-five hemiparetic subjects were asked to stand on a dual platform in a standardized position 3 months after a hemispheric stroke. First, the relationship between the %BW on each foot and the lateral shift of center of pressure was established. Second, the model was tested with a healthy subject standing on a single force platform.
The percentage of body weight may be simply modeled from the center of pressure shift, a center of pressure displacement of 10 mm corresponding to a 5% increase in body weight on this side (r=0.97, P<0.001). This linear model is reliable, accurate, and may be generalized to other stand widths.
This finding should be useful for constructors and users of single force platforms, especially those involved in posturographic assessments of asymmetric conditions such as hemiparesis.
中风患者的姿势描记术广泛基于使用单个测力平台以及通过压力中心向健侧腿的侧向移动来量化负重不对称性。由于身体两侧的体重百分比是一个更具体的变量，本研究分析了从压力中心推断体重百分比的可能性。
45名偏瘫患者在半球性中风3个月后被要求以标准化姿势站在双平台上。首先，建立每只脚的体重百分比与压力中心侧向移动之间的关系。其次，用一名健康受试者站在单个测力平台上对该模型进行测试。
体重百分比可简单地根据压力中心的移动来建模，压力中心位移10毫米对应于该侧体重增加5%（r = 0.97，P < 0.001）。该线性模型可靠、准确，并且可推广到其他站立宽度。
这一发现对于单个测力平台的制造商和使用者应是有用的，尤其是那些参与诸如偏瘫等不对称情况姿势描记评估的人员。
