Nakamura T, Yabe Y, Horiuchi Y
Department of Orthopaedic Surgery, School of Medicine, Keio University, Tokyo, Japan.
Nihon Seikeigeka Gakkai Zasshi. 1994 Jan;68(1):14-25.
A magnetic resonance (MR) study was performed using a 0.5 tesla system to investigate the behavior of the interosseous membrane of the forearm during pronation-supination and to evaluate the influence of pronation-supination loading in the neutral position. The right forearm was examined in twenty volunteers at the proximal fourth part, middle part and distal fourth part of the forearm. Slices were examined at maximum pronation, 45 degrees pronation, neutral, 45 degrees supination and at maximum supination. A 0.1 Nm torque in both rotational directions was added in the neutral position. The MR image of the interosseous membrane of the forearm was a thin line with low contrast in the neutral position. The tendinous portion and membranous portions of the interosseous membrane could be differentiated. At maximum pronation and at maximum supination, the interosseous membrane was flexed, caused mainly by the relaxation in the membranous portion. The radius shifted slightly volarly to the ulna at maximum pronation, caused by the incongruity of the distal radioulnar joint. The radius shifted dorsally with pronation loading, and shifted volarly with supination loading. The inelasticity of the membranous portion of the interosseous membrane may be responsible for pronation-supination contracture, while rotational loading may be a cause of the distal radioulnar joint dislocation. These studies suggest that this technique is useful for further in vivo studies of kinesiology.
采用0.5特斯拉系统进行了一项磁共振（MR）研究，以探究前臂旋前-旋后过程中前臂骨间膜的行为，并评估中立位时旋前-旋后负荷的影响。对20名志愿者的右前臂在前臂近端四分之一、中部和远端四分之一处进行了检查。在最大旋前、45度旋前、中立位、45度旋后和最大旋后时对切片进行检查。在中立位施加两个旋转方向均为0.1 Nm的扭矩。前臂骨间膜的MR图像在中立位时是一条对比度低的细线。骨间膜的腱性部分和膜性部分可以区分。在最大旋前和最大旋后时，骨间膜弯曲，主要是由膜性部分的松弛引起的。在最大旋前时，由于桡尺远侧关节不匹配，桡骨向尺骨略微掌侧移位。桡骨在旋前负荷时背侧移位，在旋后负荷时掌侧移位。骨间膜膜性部分的无弹性可能是旋前-旋后挛缩的原因，而旋转负荷可能是桡尺远侧关节脱位的一个原因。这些研究表明，该技术对于进一步的运动学体内研究是有用的。
