Results: (1) The nerve fibers to psoas major originated chiefly from L2, secondly from L3, and arose at the lateral-superior of the root of L2;

• 结果:支配腰大肌的神经纤维主要来源于L2,其次是L3,肌支纤维在L2神经干的外上部走行,部位较恒定。