Phuapittayalert Laorrat, Hipkaeo Wiphawi
Division of Anatomy, School of Medical Sciences, University of Phayao, Phayao, 56000, Thailand.
Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.
Anat Sci Int. 2025 May 12. doi: 10.1007/s12565-025-00845-2.
While single or dual variations of the brachial muscle have been documented, multiple muscular variations in the anterior compartment of the arm are relatively uncommon. Therefore, we aim to report the multiple muscular variation in the anterior compartment of the arm. During routine dissection, we observe the muscular variations including supernumerary heads of the biceps brachii, coracobrachialis longus, double accessory brachialis, and axillary arch muscles in the right arm of a 92-year-old male Thai cadaver. These variant muscles were supplied by branches from the musculocutaneous nerve and brachial artery. The unusual course of these muscles was associated with the neurovascular bundle, which may increase the risk of entrapment of neuropathy. Furthermore, it is essential to understand these anatomical variations to improve surgical procedures in the brachial field.
虽然肱肌的单变异或双变异已有文献记载，但臂前区的多处肌肉变异相对少见。因此，我们旨在报告臂前区的多处肌肉变异情况。在常规解剖过程中，我们在一名92岁泰国男性尸体的右臂中观察到了多处肌肉变异，包括肱二头肌额外头、肱肌长头、双副肱肌以及腋弓肌。这些变异肌肉由肌皮神经和肱动脉的分支供血。这些肌肉的异常走行与神经血管束相关，这可能会增加神经卡压性神经病的风险。此外，了解这些解剖变异对于改进臂部手术操作至关重要。
