Satyanarayana N, Vishwakarma N, Kumar G P, Guha R, Datta A K, Sunitha P
Department of Anatomy, Chitwan, Nepal.
Nepal Med Coll J. 2009 Mar;11(1):69-72.
Anatomical variations in the formation, course and distribution of brachial plexus are well documented. The present report describes some rare variations with regard to relation of cords of brachial plexus, median and ulnar nerves with the third part of axillary artery and brachial artery in the left upper limb of an adult male cadaver. All three cords of brachial plexus were noted to be lateral to all three parts of axillary artery. Median nerve was lateral to brachial artery and ulnar nerve was between the brachial artery and median nerve. Further distribution of median and ulnar nerves was normal. The arterial pattern in left arm (axillary and brachial arteries) was also normal. The findings were noted after thorough and meticulous dissection of both the upper limbs (axilla, arm, cubital fossa, forearm and palm) of the same cadaver in the Department of Anatomy, College of Medical Sciences, Bharatpur, Nepal. The right upper limb revealed no abnormality. It is important to be aware of such variations while planning a surgery in the region of axilla and arm as these nerves are more liable to be injured during surgical procedures. Possible embryological explanations and clinical significance have been discussed.
臂丛神经在形成、走行和分布方面的解剖变异已有充分记载。本报告描述了一名成年男性尸体左上肢臂丛神经束、正中神经和尺神经与腋动脉和肱动脉第三部分之间关系的一些罕见变异。臂丛神经的所有三条束均位于腋动脉所有三个部分的外侧。正中神经位于肱动脉外侧，尺神经位于肱动脉和正中神经之间。正中神经和尺神经的进一步分布正常。左臂（腋动脉和肱动脉）的动脉模式也正常。这些发现是在尼泊尔巴拉特普尔医学科学学院解剖学系对同一具尸体的双上肢（腋窝、手臂、肘窝、前臂和手掌）进行彻底细致的解剖后记录下来的。右上肢未发现异常。在计划腋窝和手臂区域的手术时，了解这些变异很重要，因为这些神经在手术过程中更容易受伤。文中还讨论了可能的胚胎学解释和临床意义。
