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目的：探讨中斜角肌内缘腱性束带与臂丛受压的关系，为临床诊治提供解剖学基础。方法：３０具成人尸体标本，观察中斜角肌内缘腱性束带的位置及其与臂丛下干的关系。结果：中斜角肌内缘腱性束带出现率为８０％，其长度为３１．５±１．５１ｍｍ、宽度为６．１±２．４ｍｍ、厚度为０．６±０．１ｍｍ。腱性束带起自第７颈椎横突上方，止于第１肋内侧缘（锁骨下动脉沟内侧端处），其形态为一条扁带形弦带，张于第１肋内侧缘上。束带与臂丛下干相交处距第１肋上面高度为４．１±１．５ｍｍ；臂丛下干的合成点与束带的关系有３种类型：Ⅰ型（束带外合干型）占１６％；Ⅱ型（束带上合干型）占３０％；Ⅲ型（束带内合干型）占５４％。结论：Ⅰ型构成对臂丛下干压迫，是导致胸廓出口综合征的主要病因之一，Ⅱ型也可以引起此征，以手术切除束带，解除压迫为最佳治疗手段。
Objective: To investigate the relationship between the tendon ligament in the medial scalene muscle and brachial plexus compression, to provide anatomical basis for clinical diagnosis and treatment. Methods: Thirty adult cadavers were used to observe the location of the tendon band in the middle scalene muscle and its relationship with the brachial plexus. RESULTS: The incidence of the midline scalene tendon band was 80% with a length of 31.5 ± 1.51 mm, a width of 6.1 ± 2.4 mm and a thickness of 0.6 ± 0.1 mm. Tendon band from the top of the 7th cervical transverse process, ending in the first rib medial margin (subclavian artery ditch medial end), the form of a flat ribbon, Zhang in the first rib medial margin. The height at the intersection of the band and the brachial plexus is 4.1 ± 1.5 mm above the first rib. The relationship between the synthetic point under the brachial plexus and the band has three types: type Ⅰ ) Accounted for 16%; type Ⅱ (tie dry type) accounted for 30%; type Ⅲ (tie dry type) accounted for 54%. CONCLUSION: Type I constitution is one of the major causes of thoracic outlet syndrome due to inferior brachial plexus compression. Type ¢ òcan also cause this symptom. Surgical removal of the ligament and lysis are the best treatments.