Snijders C J, Vleeming A, Stoeckart R
Department of Biomedical Physics and Technology, Faculty of Medicine and Allied Health Sciences, Erasmus University Rotterdam, The Netherlands.
Clin Biomech (Bristol). 1993 Nov;8(6):295-301. doi: 10.1016/0268-0033(93)90003-Z.
We developed a biomechanical model of load transfer by the sacroiliac joints in relation to posture. A description is given of two ways in which the transfer of lumbar load to the pelvis in a stooped posture can take place. One way concerns ligament and muscle forces that act on the sacrum, raising the tendency of the sacrum to flex in relation to the hip bones. The other refers to ligament and muscle forces acting on the iliac crests, raising the tendency of the sacrum to shift in caudal direction in relation to the hip bones. Both loading modes deal with the self-bracing mechanism that comes into action to prevent shear in the sacroiliac joints. When a person is lifting a load while in a stooped posture, the force raised by gravity acting in a plane perpendicular to the spine and the sacrum becomes of interest. In this situation a belt such as used by weight lifters may contribute to the stability of the sacroiliac joints. Verification of the biomechanical model is based on anatomical studies and on load application to human specimens. Magnetic resonance imaging pictures have been taken to verify geometry in vivo.
我们建立了一个与姿势相关的骶髂关节负荷传递生物力学模型。本文描述了在弯腰姿势下腰椎负荷向骨盆传递的两种方式。一种方式涉及作用于骶骨的韧带和肌肉力量，这会增加骶骨相对于髋骨发生屈曲的趋势。另一种方式是指作用于髂嵴的韧带和肌肉力量，这会增加骶骨相对于髋骨向尾侧移位的趋势。两种加载模式都涉及到为防止骶髂关节剪切力而发挥作用的自支撑机制。当一个人在弯腰姿势下提起重物时，重力在垂直于脊柱和骶骨的平面上产生的力就变得很重要。在这种情况下，举重运动员使用的那种腰带可能有助于骶髂关节的稳定性。生物力学模型的验证基于解剖学研究以及对人体标本施加负荷。已拍摄磁共振成像图片以在体内验证几何结构。
