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采用手术显微镜下解剖分离的方法,研究了22例成人肌皮神经的内部结构,及其纤维束组在臂丛内不同断面的定位。结果表明,在肌皮神经的远侧端断面,肌支束与皮支束分界明确,肌支束位于前外象限:在其近侧端断面,以混合束为主,肌支束或以肌支束为主的混合束位于前外象限,在锁骨下1cm、锁骨上1cm、1.5cm处断面,肌皮神经束组位于前上外象限;在上干断面,位于前份。肌皮神经纤维来自C_5、 C_6和C_7,神经根,其所占比例分别为31.6％,64.6％和3.8％。
Using anatomical separation under the surgical microscope, the internal structure of 22 adult musculocutaneous nerves and the localization of the fiber bundles in different sections of the brachial plexus were studied. The results showed that at the distal end of the musculocutaneous nerve, the branch between the muscular branch and the branch of the dermis is clear, and the branch of the branch of the muscular branch is located in the anterolateral quadrant. At the proximal end of the branch, the muscular branch is dominated by the bundle, Beam-dominated mixed beam located in the antero-quadrant, 1cm below the subclavian bone, 1cm on the clavicle, 1.5cm at the cross-section, fascia fasciculus group located in the former upper quadrant; in the upper cross-section, located in the former. Muscle nerve fibers from C_5, C_6 and C_7, nerve root, the proportion of 31.6%, 64.6% and 3.8%.