Haughton V M, Schmidt T A, Keele K, An H S, Lim T H
Department of Radiology, Medical College of Wisconsin, Milwaukee, USA.
J Neurosurg. 2000 Jan;92(1 Suppl):81-6. doi: 10.3171/spi.2000.92.1.0081.
The authors conducted a study in which their objective was to measure the effect of tears in the annulus fibrosus on the motions of lumbar spinal motion segments.
Lumbar spinal motion segments were harvested from human cadavers and studied using a 1.5-tesla magnetic resonance imager. The motion segments were subjected to incremental flexion, extension, rotation, and lateral bending torques. Displacements and rotations were measured using a kinematic system. The segments were sectioned on a cryomicrotome to verify the presence of tears in the annulus fibrosus.
Tears in the annulus fibrosus increase the amount of motion that results from a torque applied to the motion segment. Radial and transverse tears of the annulus fibrosus have a greater effect on motions produced by an axial rotatory torque than on those produced by flexion, extension, or lateral bending torques. The difference between normal discs and discs with annular tears is more marked during moments of axial rotational than during those of flexion, extension, or lateral bending.
作者开展了一项研究，其目的是测量纤维环撕裂对腰椎运动节段运动的影响。
从人体尸体获取腰椎运动节段，并使用1.5特斯拉磁共振成像仪进行研究。对运动节段施加递增的前屈、后伸、旋转和侧方弯曲扭矩。使用运动学系统测量位移和旋转。将节段在冷冻切片机上切片，以验证纤维环中是否存在撕裂。
纤维环撕裂会增加施加于运动节段的扭矩所导致的运动量。纤维环的放射状和横向撕裂对轴向旋转扭矩产生的运动的影响比对前屈、后伸或侧方弯曲扭矩产生的运动的影响更大。与正常椎间盘相比，存在环状撕裂的椎间盘在轴向旋转时的差异比在前屈、后伸或侧方弯曲时更为明显。
