Suomi R, Koceja D M
Department of Physical Education, University of Wisconsin, Stevens Point 54481.
Arch Phys Med Rehabil. 1994 Feb;75(2):205-9.
Previous research has shown that in healthy subjects during a quiet two-legged stance, sagittal postural sway is greater than lateral postural sway with a ratio approximating 1.5. The purpose of this study was to examine the postural sway profiles of healthy men and women, and men with mental retardation (MR). Subjects consisted of 22 men (M), 22 women (W) and 22 men with MR. Postural sway characteristics were examined using a Kistler force platform. Each subject performed six trials, three with vision and three with vision occluded. Each trial was 15sec in duration, and the subject was instructed to stand motionless on the force platform. A custom-designed computer program sampled the lateral and sagittal sway characteristics for each trial, at a sample rate of 50Hz. Results indicated that the MR group exhibited significantly more lateral sway than the other two groups, and that the sagittal/lateral sway ratio was significantly lower in this group. Moreover, the MR group showed a greater amount of sway in the no-vision condition than either the M or W groups. Using the sagittal/lateral sway ratio, discriminant analyses indicated that group membership could be predicted in 75% to 82% of the cases in the vision condition, and 64% to 73% of the cases in the no-vision condition. It is concluded that the sagittal/lateral sway ratio provides a valid and objective assessment measure to determine the postural control/balance capacities of persons with MR. In addition, it is hypothesized that this ratio may prove useful in quantifying the effectiveness of therapeutic intervention programs on balance performance.
先前的研究表明，在健康受试者安静的双腿站立过程中，矢状面姿势摆动大于侧面姿势摆动，其比例约为1.5。本研究的目的是检查健康男性和女性以及智力迟钝（MR）男性的姿势摆动特征。受试者包括22名男性（M）、22名女性（W）和22名患有MR的男性。使用奇石乐测力平台检查姿势摆动特征。每个受试者进行6次试验，3次试验时视觉正常，3次试验时视觉被遮挡。每次试验持续15秒，受试者被要求静止站立在测力平台上。一个定制的计算机程序以50Hz的采样率对每次试验的横向和矢状面摆动特征进行采样。结果表明，MR组的横向摆动明显多于其他两组，且该组的矢状面/横向摆动比率明显较低。此外，MR组在无视觉条件下的摆动量比M组或W组都要大。使用矢状面/横向摆动比率进行判别分析表明，在有视觉条件下，75%至82%的病例能够预测出所属组别，在无视觉条件下，64%至73%的病例能够预测出所属组别。得出的结论是，矢状面/横向摆动比率为确定MR患者的姿势控制/平衡能力提供了一种有效且客观的评估方法。此外，据推测，该比率可能有助于量化治疗干预方案对平衡能力的有效性。
