Objective: To investigate the relationship of musculus psoas major role and the formation of lumbar curvature.

目的：探讨腰大肌的作用及其与人类腰曲形成的关系。

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Walking brought along the lumbar vertebra to bend forward and rotate with the movement of right and left lower limbs. The main force to finish this movement came mainly from musculus psoas major.

步行带动腰椎向前弯曲并随左右下肢运动而旋转、侧弯，其主要作用力来自腰大肌。

youdao

Walking brought along the lumbar vertebra to bend forward and rotate with the movement of right and left lower limbs. The main force to finish this movement came mainly from musculus psoas major.

步行带动腰椎向前弯曲并随左右下肢运动而旋转、侧弯，其主要作用力来自腰大肌。

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