Darvishi Marzieh, Moayeri Ardeshir
Department of Anatomy, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran.
Folia Med (Plovdiv). 2019 Jun 1;61(2):327-331. doi: 10.2478/folmed-2018-0080.
The musculocutaneous nerve is a large terminal branch of the lateral cord of the brachial plexus. It passes under the pectoralis minor and penetrates the coracobrachialis muscle, descending between the biceps brachii and brachialis muscles in the arm. After dissection in upper extremities in a 28-year-old male cadaver, the median and musculocutaneous nerve were found to have variations on the right side where the musculocutaneous nerve formed communications with the median nerve. The median nerve innervated muscles of the front of the arm in this cadaver. In addition, the musculocutaneous nerve did not pierce the coracobrachialis muscle on the right side. Knowledge of these variations is extremely important when planning a surgery in the region of axilla.
肌皮神经是臂丛神经外侧束的一个大的终末分支。它在胸小肌下方通过，穿入喙肱肌，在臂部沿肱二头肌和肱肌之间下行。在一具28岁男性尸体的上肢进行解剖后发现，右侧的正中神经和肌皮神经存在变异，肌皮神经与正中神经形成了交通。在这具尸体中，正中神经支配了臂前部的肌肉。此外，右侧的肌皮神经未穿入喙肱肌。在计划腋窝区域的手术时，了解这些变异极为重要。
