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目的了解斜角肌间隙内臂丛下干与邻近组织结构及胸１神经干与第１肋的关系，为临床诊治臂丛下干卡压症提供解剖学依据。②方法在２１具４２侧成人标本上观测臂丛下干与邻近结构的位置关系。③结果在４２侧标本的斜角肌间隙内，有３３侧在前斜角肌的后内侧存在孤立的肌束，臂丛下干分别从其前下方（２３侧）或后上方（１０侧）通过；组成臂丛下干的胸１神经干在斜越第１肋前内侧面时部分穿行于骨纤维管内。④结论该肌束的压迫或拱抬均可成为臂丛下干受压的因素之一；组成臂丛下干的胸１神经干在越过第１肋时易受压迫。
Objective To understand the relationship between the inferior brachial plexus and adjacent tissue in the mitotic space and the relationship between the thoracic-1 trunk and the first rib, and to provide anatomical basis for clinical diagnosis and treatment of cardiopulmonary embolism. ② Methods 21 cases with 42 side adult specimens observed under the brachial plexus and the adjacent structure of the relationship between the position. (3) Results There were 33 isolated myofascial bundles in the posterior scalene muscle of the 42 sides of the hypothalamus, and the inferior brachial plexus was separated from the anteroposterior (23 sides) or posterior (10 sides) Through; composed of brachial plexus stem 1 dry trunk in the oblique side of the first rib when the inner part of the line through the bone within the fibrous tube. ④ Conclusion The compression or arch of the muscle bundle can become one of the factors under the dry compression of the brachial plexus; the trunk of the thoracic-1 trunk under the brachial plexus is vulnerable to compression when passing over the first rib.