Laboratory of Human Anatomy, Industrial University of Santander, Santander, Colombia.
Division of Orthopaedic Surgery, Industrial University of Santander, Santander, Colombia.
J Hand Surg Eur Vol. 2022 Jul;47(7):761-765. doi: 10.1177/17531934221080952. Epub 2022 Feb 28.
We describe the patterns of motor branches to the elbow flexors in 106 fresh-frozen cadaveric upper extremities from 53 donors of the Latin American mestizo race. We identified a 20% incidence of an accessory biceps head. The innervation patterns to this accessory head were specifically described and added to the Yang classification as Type IV for the biceps and Type III for the brachialis. The patterns arising from the musculocutaneous nerve to the biceps brachii were of Type I in 69%, Type II in 9%, Type III in 7% and Type IV in 11%, and to the brachialis of Type I in 77%, Type II in 11% and Type III in 9%. In 4%, the branches did not originate from the musculocutaneous nerve. We hypothesize that the branch to the accessory biceps head might be considered as a donor for nerve transfer in selected brachial plexus injuries.
我们描述了 53 名拉丁裔梅斯蒂索人的 106 具新鲜冷冻上肢尸体中肘部屈肌运动支的分布模式。我们发现了 20%的二头肌副头发生率。对这个副头的神经支配模式进行了具体描述，并将其添加到了 Yang 分类中，二头肌为 IV 型，肱肌为 III 型。发自肌皮神经的肱二头肌支的分布模式为 I 型 69%、II 型 9%、III 型 7%和 IV 型 11%，肱肌为 I 型 77%、II 型 11%和 III 型 9%。4%的分支并非发自肌皮神经。我们假设，副二头肌头的分支可能被认为是在特定的臂丛神经损伤中进行神经转移的供体。
