Department of Physical Medicine and Rehabilitation, Korea University Guro Hospital, Seoul, South Korea.
Muscle Nerve. 2021 Nov;64(5):603-606. doi: 10.1002/mus.27387. Epub 2021 Aug 24.
INTRODUCTION/AIMS: The posterior antebrachial cutaneous nerve (PACN) is one of the cutaneous branches of the radial nerve, and receives sensory input from the posterior arm and forearm. The aim of this study is to describe the ultrasonographic anatomy of the PACN.
PACN and its branches were scanned using ultrasonography in 30 healthy volunteers. The distances between the epicondylar line and the bifurcation site of each branch of PACN (A) point of separation of the radial nerve and the PACN, (B) point of separation of the anterior and posterior divisions, (C) point of bifurcation of the posterior division into the epicondylar and anconeus branches), cross-sectional areas and depths from the skin surface to each nerve at positions A, B, and C were measured.
The mean distance from the epicondylar line to A, B, and C was 10.01 ± 0.82 cm, 7.46 ± 0.98 cm, and 4.02 ± 1.16 cm, respectively. The mean depth from the skin surface at A, B, and C was 1.00 ± 0.19 cm, 0.72 ± 0.19 cm, and 0.51 ± 0.12 cm, respectively.
Ultrasonographic visualization of the PACN and its major branches was feasible. The reference values in this study may be helpful for more accurate sonographic assessment and electrophysiologic study, and contribute to safer interventions around the elbow region.
介绍/目的：前臂后皮神经（PACN）是桡神经的皮支之一，接收来自臂后和前臂的感觉输入。本研究的目的是描述 PACN 的超声解剖结构。
使用超声对 30 名健康志愿者的 PACN 及其分支进行扫描。测量从桡神经和 PACN 的分离点（A 点）、前分支和后分支的分离点（B 点）、后分支分叉为肘支和肱三头肌支的（C 点）到各分支的皮神经的距离（A、B 和 C 点）、各点的横截面积和从皮肤表面到各神经的深度。
从肱骨线到 A、B 和 C 的平均距离分别为 10.01±0.82cm、7.46±0.98cm 和 4.02±1.16cm。A、B 和 C 处皮肤表面的平均深度分别为 1.00±0.19cm、0.72±0.19cm 和 0.51±0.12cm。
PACN 及其主要分支的超声可视化是可行的。本研究中的参考值可能有助于更准确的超声评估和电生理研究，并有助于肘部周围更安全的干预。
