A two-trunked anatomical variance of the brachial plexus: A cadaveric case report

Q3 Medicine

Translational Research in Anatomy Pub Date : 2025-07-18 DOI:10.1016/j.tria.2025.100422

Catherine A. Cash , Camryn Buskey , Eistine Boateng , Adel Maklad , Hamoun Delaviz

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引用次数: 0

Abstract

Background

The brachial plexus is a network of nerves connecting five spinal nerve roots (C5-C8 and T1) and is responsible for transmitting motor and sensory signals to the upper limb. The ventral rami typically form three trunks, superior (C5-C6), middle (C7), and inferior (C8-T1), where each trunk channels motor and sensory information to specific upper limb regions.

Methods

A unique variation of the trunks of the brachial plexus was discovered during a routine dissection of a male cadaver within an anatomy laboratory.

Results

We present a case of a prefixed, two trunk brachial plexus, formed by the fusion of the middle and inferior trunks, along with downstream variations in the terminal nerve branches.

Conclusions

While anatomical variations of the brachial plexus are documented in the literature, fusion of the middle and inferior trunks are not commonly observed in human anatomy and subsequently not documented in the literature. Furthermore, we observed a prefixed plexus and anomalous communicating branches of the musculocutaneous nerve to the median nerve as additional features of the network. Altogether, understanding these variations is crucial for physicians, as it can affect surgical procedures and clinical presentations.

查看原文本刊更多论文

臂丛的两干解剖变异：一个尸体病例报告

臂丛是连接五个脊神经根（C5-C8和T1）的神经网络，负责向上肢传递运动和感觉信号。腹侧支通常形成三条主干，上（C5-C6）、中（C7）和下（C8-T1），其中每条主干将运动和感觉信息传递到特定的上肢区域。方法在解剖实验室对一具男性尸体进行常规解剖时，发现臂丛主干有独特的变异。结果我们报告了一个由中下干融合形成的固定的双干臂丛，以及末端神经分支的下游变异。结论虽然文献记载了臂丛的解剖变异，但在人体解剖学中并不常见到中下干的融合，因此也没有文献记载。此外，我们还观察到一个固定的神经丛和肌肉皮神经与正中神经的异常交通分支作为网络的附加特征。总之，了解这些变异对医生来说是至关重要的，因为它会影响手术过程和临床表现。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Translational Research in Anatomy Medicine-Anatomy

CiteScore

2.90

自引率

0.00%

发文量

审稿时长

25 days

期刊介绍： Translational Research in Anatomy is an international peer-reviewed and open access journal that publishes high-quality original papers. Focusing on translational research, the journal aims to disseminate the knowledge that is gained in the basic science of anatomy and to apply it to the diagnosis and treatment of human pathology in order to improve individual patient well-being. Topics published in Translational Research in Anatomy include anatomy in all of its aspects, especially those that have application to other scientific disciplines including the health sciences: • gross anatomy • neuroanatomy • histology • immunohistochemistry • comparative anatomy • embryology • molecular biology • microscopic anatomy • forensics • imaging/radiology • medical education Priority will be given to studies that clearly articulate their relevance to the broader aspects of anatomy and how they can impact patient care.Strengthening the ties between morphological research and medicine will foster collaboration between anatomists and physicians. Therefore, Translational Research in Anatomy will serve as a platform for communication and understanding between the disciplines of anatomy and medicine and will aid in the dissemination of anatomical research. The journal accepts the following article types: 1. Review articles 2. Original research papers 3. New state-of-the-art methods of research in the field of anatomy including imaging, dissection methods, medical devices and quantitation 4. Education papers (teaching technologies/methods in medical education in anatomy) 5. Commentaries 6. Letters to the Editor 7. Selected conference papers 8. Case Reports