Soni Simmi, Rath Gayatri, Suri Rajesh, Kumar Hitendra
Department Of Anatomy, Vardhman Mahavir Medical College and Safdarjang Hospital, New Delhi, India.
Anat Sci Int. 2008 Dec;83(4):310-3. doi: 10.1111/j.1447-073X.2008.00234.x.
Anomalous disposition of pectoral muscles was encountered in an adult female cadaver on the left side. A prominent cleft separating the sternocostal and clavicular portions of the pectoralis major was noticed. The fibers of pectoralis major were partially fused with the deltoid, resulting in obliteration of the deltopectoral groove. Interestingly, cephalic vein was seen traversing superficial to the clavicular portion of the pectoralis major and pierced it to drain into the axillary vein. The pectoralis minor was inserted mainly on the coracoid process and few fibers were found blending with the coracobrachialis and short head of biceps brachii. Further, pectoralis minimus, a rare anatomic variant, was also observed lying superior to pectoralis minor. It was innervated by a twig from the lateral pectoral nerve at its superficial surface. Awareness of possibility of such anomalous muscles is important for surgeons operating on the chest wall.
在一具成年女性尸体左侧发现胸肌排列异常。注意到一条明显的裂隙将胸大肌的胸肋部和锁骨部分隔开。胸大肌的纤维部分与三角肌融合，导致三角胸肌沟消失。有趣的是，头静脉在胸大肌锁骨部浅面走行，并穿入该肌汇入腋静脉。胸小肌主要附着于喙突，发现少数纤维与肱二头肌短头和喙肱肌融合。此外，还观察到一块罕见的解剖变异肌——最小胸肌，位于胸小肌上方。它由胸外侧神经的一个分支在其浅面支配。对于在胸壁进行手术的外科医生来说，了解这种异常肌肉存在的可能性很重要。
