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制作教学标本时,在成人男性尸体上发现左侧臂丛变异,为股束变异丛。5根3干正常,上、中、下3干后股合成后束,下干前股全部加入外侧束,内侧束未形成。3干前股合并位于锁骨下动脉外上,继行于腋动脉外侧。3干的分股及合束位置在锁骨后方。桡神经、腋神经发自后束,胸背神经发自腋神经。肌皮神经、正中神经、尺神经、前臂内侧皮神经发自外侧束(附图)。腋动脉位于臂丛内侧,左锁骨下动脉位于臂丛前
Making teaching specimens, in the adult male body found on the left brachial plexus, the bundle of mutations. 5 3 3 normal, upper, middle and lower 3 after the stock after the beam synthesis, under the dry before the shares were added to the lateral bundle, medial bundle is not formed. 3 dry before the merger shares located outside the subclavian artery, followed by axillary artery outside. 3 dry branches and combined position in the clavicle behind. Radial nerve, axillary nerve from the beam, thoracodorsal nerve from the axillary nerve. The musculocutaneous nerve, median nerve, ulnar nerve, medial forearm nerve bundle originate from the lateral bundle (photo). The axillary artery is located inside the brachial plexus and the left subclavian artery is located in front of the brachial plexus