Kuriyama Naoyuki, Ito Hiromoto
Department of Orthopaedic Surgery, Nippon Medical School, Tokyo, Japan.
J Nippon Med Sch. 2005 Jun;72(3):165-73. doi: 10.1272/jnms.72.165.
The lumbar paraspinal muscles were examined by surface electromyography (EMG) in 22 patients with low back pain and 22 healthy volunteers. Surface electrodes were placed bilaterally on the lumbar multifidus and longissimus muscles at the level of the spinous process of the third lumbar vertebra. Kinesiologic EMG was recorded, in standing resting position, during the following trunk motions: trunk forward flexion and extension, lateral bending and axial rotation. No muscular activity was observed in the full trunk flexion position in the control group. In contrast, continuous muscle activity was observed in the low back pain group. On axial rotation, an intermuscular time lag was observed at the beginning of the motion in the control group. In the low back pain group, there was no such time lag. Paraspinal muscle activities restricted lumbar range of motion, and protect from injury for movement. This suggests their role as stabilizers.
通过表面肌电图（EMG）对22例腰痛患者和22名健康志愿者的腰段椎旁肌进行了检查。将表面电极双侧置于第三腰椎棘突水平的腰多裂肌和最长肌上。在站立休息位，记录以下躯干运动过程中的运动学肌电图：躯干前屈和后伸、侧屈和轴向旋转。对照组在躯干完全前屈位未观察到肌肉活动。相比之下，腰痛组观察到持续的肌肉活动。在轴向旋转时，对照组在运动开始时观察到肌肉间的时间延迟。在腰痛组中，没有这种时间延迟。椎旁肌活动限制了腰椎的活动范围，并在运动时起到保护作用。这表明它们作为稳定肌的作用。
