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- Yoshimi Tsutomu
- First Department of Aantomy, Faculty of Medicine, Nagasaki University
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説明
The condition of division of the arteries of the arm and their relation to nerves were investigated on 100 upper arms from 50 cadavers of macacus cyclopsis. The results are as follows.<BR>1) The a. brachialis unfailingly penetrates the ansa n. medianus and both types A andB of Adachi's classification are to be found. Their rate of appearance is; type A 97.0% and type B 3.0%. Type C has been reported to occur in lower monkeys and advanced simiidae for primates but the author has not found a single case in this study.<BR>2) The a. thoracoacromialis and a. thoracica suprema are absent but the a. thoracica lateralis is always found.<BR>3) The a. subscapularis arises by a common trunk in 94.0% with independent origin in 4.0% which indicates greater tendency for united origin than in man.<BR>In its relation to the m. pectoralis minor, it arises in a greater number of cases (87.2%) behind the m. pectoralis minor which is higher than in man.<BR>In the relation of a. subscapularis to the n. medianus and ansa n. medianus, type I in which the a. subscapularis arises from the main trunk of the a. brachialis and is located posterior to the n. medianus and the n. ulnaris is the typical form.<BR>4) In the relation of the a. circumflexa humeri dorsalis to the tendon of insertion of the m. latissimus dorsi, it always arises at the upper margin of the tendon and never originates below the tendon.<BR>5) The a. circumfloca humeri volaris arose by a common origin with the a. circumflexa humeri dorsalis from the a. brachialis profunda in a large number of cases (55 %) with a greater tendency for union than in man.<BR>6) 2 or 3 branches supply the m. biceps brachii in the majority of the cases with these arteries passing behind the n. medianus.<BR>7) The a. brachialis superficialis, the appearance of which is said to be abnormal in man, always was to be found in macacus cyclopsis and corresponds to the a. brachialis superficialis inferior in the classification for man by Müller. Its origin is comparatively low for a primate with the majority arising below the central portion of the arm.<BR>Further, comparison of the size of the a. brachialis superficialis and the a. brachialis profunda shows that the former is larger than the latter.
収録刊行物
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- Okajimas Folia Anatomica Japonica
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Okajimas Folia Anatomica Japonica 29 (3), 181-209, 1956
Editorial Board of Okajimas Folia Anatomica Japonica