胸骨肌(m.sternalis)为胸部异常肌肉。有关胸骨肌的形态描述、功能的研究以及发生来源问题国内外均有文献报道。我们在制作教学标本过程中遇到一例:男性,成人,中等身材,发育较佳。解剖所见:胸骨肌对称。形状均呈扁平长肌状。但右侧者较左侧者稍显著。该两肌均沿胸骨两侧纵行排列(附图),且均从第6、7肋软骨高度起始并与腹直肌鞘相续,肌腹上行左侧止于胸骨角处。右侧上方越过 The sternalis is an abnormal muscle in the chest. About the description of the shape of the sternum muscle, the study of the function and the origin of the problem have been reported in the literature. We encountered in the production of teaching specimens encountered an example: men, adults, medium stature, better development. Anatomy see: Sternochorous muscle symmetry. The shape was flat and long muscle. However, the right side is slightly more significant than the left side. Both muscles were longitudinally aligned along the sternum (with photos) and both started from the 6,7th costal cartilage and continued with the rectus sheath, with the left side of the muscle ascending to the sternal angle. Over the right side of the top