A rare case of multiple neuromuscular variations in the axilla and arm

During the dissection of a 73-year-old embalmed male cadaver, we noted unusual variations in the flexor compartment of the upper limb—bilateral axillary arch muscles, a three-headed biceps brachii muscle with two supernumerary bellies—and variations in the origin of the musculocutaneous and median nerves from the brachial plexus. The morphological and clinical significance of this unique coexistence of multiple neuromuscular variations are discussed.

摘要在常規的大體解剖學實習課程中，我們由一位73歲男性大體老師上肢的屈肌部分同時發現多個變異，包括有兩側的腋弓肌、右側具第三肌頭及兩個額外的肌腹的肱二頭肌、以及肌皮神經和正中神經起源於臂神經叢的變異。我們將針對此獨特的神經肌肉變異在形態上及臨床上的重要性進一步地探討。