目的　为闭孔神经或生殖股神经移位修复腰骶丛根性撕脱伤的临床应用提供解剖学基础。方法    新鲜成人整尸6具，解剖测量双侧闭孔神经、生殖股神经、股神经及骶神经根的长度、横径和纵径，计算横截面积，并在高倍显微镜下计数有髓神经纤维数目。  结果    右侧闭孔神经经椎体前腹膜后移位至左侧，与左侧股神经均能直接吻合，且有2~3 cm的重叠。左侧生殖股神经、闭孔神经切断后均能与同侧S1、S2神经根吻合，且有2~4 cm的重叠。闭孔神经的神经纤维数目（4400~7800根）为股神经纤维数目（13000~20000根）的1/3，生殖股神经的神经纤维数目（3000~4500根）为骶2神经的纤维数目（4500~8500根）的1/2，闭孔神经纤维数目（4400~7800根）与S1神经纤维数目（5000~9000根）基本相当。  结论     闭孔神经或生殖股神经可作为动力源神经移位修复腰骶丛根性撕脱伤。

Objective　To provide anatomic basis for clinical application of the obturator nerve and/or genitofemoral nerve transfering to repair the lumbosacral plexus nerves avulsion injuries.　Methods　The length, cross diameter, longitudinal diameter, cross-sectional area and the amount of myelinated nerve fibers of obturator nerve, genitofemoral nerve, femoral nerve, lumbosacral plexus and sacral plexus on both sides of 6 adult cadaveric specimens were exposed and measured respectively.　Results　The right proximal obturator nerve could be transfered to the left distal femoral nerve through anterior surface of vertebrae and posterior surface of the peritoneum, with the overlap of fiber terminals about 2~3 cm. The right obturator nerve and genitofemoral nerve could be transfered to ipsilateral S1 and S2 nerve root with the overlap of 2~4 cm respectively. The fiber number of the obturator nerve (4400~7800) was about 1/3 of the femoral nerve (13000~20000). The fiber number of genitofemoral nerve (3000~4500) was about 1/2 of the S2 nerve (4500~8500). The fiber number of obturator nerve (4400~7800) was roughly equal to that of the S1 nerve (5000~9000).　Conclusions　Obturator nerve and genitofemoral nerve can be used as donor nerves to repair the lumbosacral plexus nerve avulsion injuries.