Andersson E, Oddsson L, Grundström H, Thorstensson A
Department of Neuroscience, Karolinska Institute, Stockholm, Sweden.
Scand J Med Sci Sports. 1995 Feb;5(1):10-6. doi: 10.1111/j.1600-0838.1995.tb00004.x.
The activation patterns of the psoas and iliacus muscles were investigated in 7 healthy adult subjects (4 men and 3 women) during a variety of motor tasks in standing, sitting and lying. Myoelectric activity was recorded simultaneously from the 2 muscles using thin wire electrodes inserted under guidance of high-resolution ultrasound. In general, both muscles were coactivated, albeit to different relative levels, particularly when hip flexor torque was required. Selective activation of the iliacus could, however, be seen to stabilize the pelvis in contralateral hip extension during standing. Psoas was found to be selectively involved in sitting with a straight back and in contralateral loading situations requiring stabilization of the spine in the frontal plane. During training exercises from a supine position, such as sit-ups, the contribution of the psoas and iliacus muscles could be varied by changing the range of motion as well as the position and support for the legs. Thus, the 2 anatomically different muscles of the iliopsoas complex were shown to have individual and task-specific activation patterns depending on the particular demands for stability and movement at the lumbar spine, pelvis and hip.
在7名健康成年受试者（4名男性和3名女性）进行站立、坐立和躺卧等各种运动任务期间，对腰大肌和髂肌的激活模式进行了研究。使用在高分辨率超声引导下插入的细线电极同时记录这两块肌肉的肌电活动。总体而言，两块肌肉均被共同激活，尽管相对水平不同，尤其是在需要髋部屈肌扭矩时。然而，在站立时对侧髋部伸展过程中，可以看到髂肌的选择性激活能够稳定骨盆。发现腰大肌选择性地参与挺直背部坐姿以及在需要在额状面稳定脊柱的对侧负重情况下。在从仰卧位进行训练练习（如仰卧起坐）时，通过改变运动范围以及腿部的位置和支撑，可以改变腰大肌和髂肌的作用。因此，髂腰肌复合体这两块解剖结构不同的肌肉根据腰椎、骨盆和髋部对稳定性和运动的特定需求，表现出各自特定于任务的激活模式。
