Day J W, Smidt G L, Lehmann T
Phys Ther. 1984 Apr;64(4):510-6. doi: 10.1093/ptj/64.4.510.
Low back dysfunction is associated in many cases with lumbar lordosis, and tilting the pelvis posteriorly is often recommended for therapeutic purposes. The influence of pelvic tilt on the spinal curves has not been studied. The purpose of this study was to use an objective noninvasive method to determine the effect of the pelvic tilt on the spinal curves in the sagittal plane. Thirty-two healthy subjects and 15 patients with chronic low back dysfunction (CLBD) were studied. Patients with CLBD and healthy subjects were instructed in performing active anterior and posterior pelvic tilt maneuvers, first in the supine and then in the standing position. Comparisons between the Patient Group and the Healthy Group were made for several variables representing the severity of spinal curves, pelvic orientation, hip orientation, and knee orientation. A computerized system, the Iowa Anatomical Position System, was used to obtain coordinates of external body surface landmarks from which pelvic tilt measurements were determined. The results showed that the voluntary pelvic tilt did not alter the thoracic spinal curve. For both the Healthy Group and the Patient Group, the lumbar curve was altered by the pelvic tilt: anterior tilt increased the depth of the lumbar curve and posterior tilt decreased the depth of the lumbar curve. The amount of pelvic tilt was the same whether knees were extended or flexed approximately 10 degrees. Pelvic tilt also tended to influence the orientation of the head and other parts of the body.
在许多情况下，下背部功能障碍与腰椎前凸有关，为了治疗目的，通常建议将骨盆向后倾斜。骨盆倾斜对脊柱曲线的影响尚未得到研究。本研究的目的是使用一种客观的非侵入性方法来确定骨盆倾斜对矢状面脊柱曲线的影响。对32名健康受试者和15名慢性下背部功能障碍（CLBD）患者进行了研究。指导CLBD患者和健康受试者进行主动的骨盆前倾和后倾动作，首先是仰卧位，然后是站立位。对代表脊柱曲线严重程度、骨盆方向、髋关节方向和膝关节方向的几个变量进行了患者组和健康组之间的比较。使用一种计算机系统——爱荷华解剖位置系统，来获取体表标志点的坐标，由此确定骨盆倾斜度测量值。结果表明，自主的骨盆倾斜并未改变胸椎曲线。对于健康组和患者组，骨盆倾斜都会改变腰椎曲线：前倾会增加腰椎曲线的深度，而后倾会减小腰椎曲线的深度。无论膝关节是伸直还是屈曲约10度，骨盆倾斜的幅度都是相同的。骨盆倾斜还倾向于影响头部和身体其他部位的方向。
