笔者在解剖1成年女尸,发现其左侧肌皮神经缺如变异,原肌皮神经支配和分布范围由正中神经各分支所代替,右侧肌皮神经正常。为积累资料及提供临床医生参考,现报道如下:该例左侧臂丛的内侧束、外侧束及后束分别位于腋动脉的后方、前外侧及内侧。内侧束和外侧束分别发出正中神经内侧根和外侧根,两根在胸小肌下缘,腋动脉前方合并成正中神经干,下行 The author anatomizes an adult female corpse and found that the left dermis nerve lack of variation, the original dermis muscle innervation and the distribution of the branch by the median nerve replaced by the right side of the muscular nerve normal. To accumulate data and provide clinicians reference, are reported as follows: The left arm brachial medial bundle, lateral bundle and posterior bundle were located in the axillary artery behind, anterolateral and medial. Medial and lateral lateral bundle were issued medial medial root and lateral root, two in the lower edge of the pectoralis minor, anterior axillary artery merge into the median nerve trunk, down