Illustrated Encyclopedia of Human Anatomic Variation: Opus I: Muscular System: Alphabetical Listing of Muscles: T
Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD
Peer Review Status: Internally Peer Reviewed
Mori provides a statistical report of 310 sides, 155 cadavers:
Highest Rib of Insertion
Rib |
Number of sides |
% |
I |
7 |
2.2 |
II |
122 |
39.3 |
III |
155 |
50.0 |
IV |
23 |
7.4 |
V |
3 |
0.9 |
Lowest Rib of Insertion
Rib |
Number of sides |
% |
V |
50 |
16.1 |
VI |
237 |
76.4 |
VII |
23 |
7.4 |
The Extent of Transversus Thoracis on Inner Surface of Thoracic Wall
Highest Rib |
Lowest Rib |
||
V |
VI |
VII |
|
I |
1 (0.3%) |
6 (3.9%) |
9 (2.9%) |
II |
27 (8.74%) |
86 (27.7%) |
- |
III |
21 (6.7%) |
121 (39.3%) |
13 (4.1%) |
IV |
1 (.3%) |
21 (6.7%) |
1 (0.3%) |
V |
3 (0.9%) |
The subcostales are usually better developed on the inner surface of the thorax and are variable in number.
Syn.: Tr. Th.: m. triangularis sterni s. sternocostalis (Henle), transversus pectoris (Arnold), Sternoabdominalis (Rosenmüller), Dreieckiger or innerer Brustmuskel, Petit dentelé anterieur (Cruveilheir).
Varieties of Chest, Neck, and Shoulder
Muscles-Sternocostalis.
modified and redrawn from Wood.
References
Anson, B.J., Ed. (1966) Morris' Human Anatomy, 12th ed. The Blakiston Division, McGraw-Hill Book Company, New York.
Macalister, A. (1875) Observations on the muscular anomalies in the human anatomy. Third series with a catalogue of the principal muscular variations hitherto published. Trans. Roy. Irish Acad. Sci. 25:1-134.
Mori,M. (1964) Statistics on the musculature of the Japanese. Okajimas Fol. Anat. Jap. 40:195-300.
de Pina, L. (1933) Le muscle petit dentele postieur et superieur chez l'homme et les primates. L'Assoc. Anatomistes, Comptes rendus 28:523-531.
Wood, J. (1870) On a group of varieties of the muscles of the human neck, shoulder, and chest, and their transitional forms and homologies in the mammalia. Phil. Trans. R. Soc. (Lond.) 160:83-116.
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