Koichiro Sakanaka, Masahito Yamamoto, Takanori Ishibashi, Nobuaki Yanagisawa, Jose Francisco Rodríguez-Vázquez, Gen Murakami, Shin-Ichi Abe
The teres major and latissimus dorsi muscles (TM, LD) are considered to be the so-called brother muscles. Actually, being similar to the TM, an uppermost part of the LD usually arises from the scapular plate. In embryos of 11 mm CRL, anlagen of the TM and LD appeared to be fused to provide a single mass at an angle between the axillary and radial nerves. However, splitting had already finished in not only the TM and LD but also the other muscles at and around the shoulder in specimens of 14 mm CRL. Thus, muscle splitting at the region appeared to occur simultaneously at a short stage of 12-13 mm CRL...
2017: Okajimas Folia Anatomica Japonica