Moriya A, Takafuji T, Sato Y
First Department of Anatomy, Kyorin University School of Medicine, Tokyo, Japan.
Okajimas Folia Anat Jpn. 1993 Mar;69(6):321-33. doi: 10.2535/ofaj1936.69.6_321.
In the following, we report our findings obtained as a result of injecting an acrylic pigment in the arteries supplying the pectoralis minor muscle in 50 lateral chests of 26 Japanese adults (15 males and 11 females). In the pectoralis minor muscle, the muscular bundle near the terminal is supplied by A. processus coracoideris (Pc, Sato-Takafuji, '85) or A. coracobrachialis (Cb, Sato, '80) of A. axillaris (Ax), while its middle upper and lower peripherals are supplied by A. thoracoacromialis (Ta) and A. partis abdominalis (Pab, Sato, '76), respectively. Further, the upper and lower peripherals at its origin are supplied by A. thoracica suprema (Ts) and A. thoracica lateralis (Tl), respectively. Pc, Cb, Pab and Ts may occasionally be absent. Arteries supplying this muscle are classified according to their origins and routes of distribution, as follows. Type I-a: Pc or Cb, Ta, Pab, Ts and Tl are present, 32%; Type II-a: Ts is absent from Type I-a, 14%; Type III-a: Pb and Pc are absent from Type I-a, 20%; Type IV-a: Cb, Pc and Ts are absent from Type I-a, 10%. Type b is Type a without Pab. The rates of appearance of Type I-b, II-b, III-b and IV-b were all 6%. The ratios of distribution in area a were as follows, in order of decreasing ratio: 37.6% for Pab (37 cases), 32.4% for Tl (49 cases), 30.2% for Ta (49 cases), 10.8% for Ts (32 cases), 7% for Cb (9 cases), and 6.37% for Pc. In the pectoralis minor muscle, the major supplying arteries are Pab, Tl and Ta, and where Pab was absent, this was compensated for by a branch of Ta. The total number of supplying arteries in this muscle was two to five, with the majority, or 36%, having four arteries. As for sex differences in the incidence of each type, Type I-a appeared more often in males (40%) than in females (20%). The rates according to the ribs of origin were 46%, 36%, 16%, and 2% for types 2.3.4.5, 3.4.5, 2.3.4, and 2.3.4.5.6, respectively. It was interesting that all Type II and Type IV cases without Ts corresponded to Type 3.4.5 without the muscular bundle arising from the second rib, as it suggests the process of degeneration of the pectoralis minor muscle in Homo.(ABSTRACT TRUNCATED AT 400 WORDS)
在以下内容中，我们报告了对26名日本成年人（15名男性和11名女性）的50侧胸部，在供应胸小肌的动脉中注入丙烯酸颜料后所获得的研究结果。在胸小肌中，靠近末端的肌束由腋动脉（Ax）的喙突动脉（Pc，佐藤 - 高藤，'85）或肱动脉（Cb，佐藤，'80）供应，而其中上和下周边分别由胸肩峰动脉（Ta）和腹部分支动脉（Pab，佐藤，'76）供应。此外，其起始处的上、下周边分别由胸最上动脉（Ts）和胸外侧动脉（Tl）供应。Pc、Cb、Pab和Ts偶尔可能缺失。供应该肌肉的动脉根据其起源和分布途径分类如下。I - a型：Pc或Cb、Ta、Pab、Ts和Tl均存在，占32%；II - a型：I - a型中Ts缺失，占14%；III - a型：I - a型中Pb和Pc缺失，占20%；IV - a型：I - a型中Cb、Pc和Ts缺失，占10%。b型是没有Pab的a型。I - b型、II - b型、III - b型和IV - b型的出现率均为6%。在a区的分布比例如下，按比例递减顺序排列：Pab为37.6%（37例），Tl为32.4%（49例），Ta为30.2%（49例），Ts为10.8%（32例），Cb为7%（9例），Pc为6.37%。在胸小肌中，主要供应动脉是Pab、Tl和Ta，当Pab缺失时，由Ta的分支进行代偿。该肌肉供应动脉的总数为2至5条，其中多数（36%）有4条动脉。至于各类型发病率的性别差异，I - a型在男性中出现的频率（40%）高于女性（20%）。根据起源肋骨的类型发生率分别为：2、3、4、5肋骨起源的为46%，3、4、5肋骨起源的为36%，2、3、4肋骨起源的为16%，2、3、4、5、6肋骨起源的为2%。有趣的是，所有没有Ts的II型和IV型病例都对应于没有从第二肋骨发出肌束的3、4、5型，这表明人类胸小肌的退化过程。（摘要截断于400字）
