|
| Type of anatomical variation | Incidence [%] in male cadavers (n = 22) | Incidence [%] in female cadavers (n = 18) | Total incidence [%] in examined cadavers
(n = 40) | Total incidence [%] for all examined specimens (n = 80) |
|
| Typical morphology of PM | Bilaterally: 13 cadavers (13/22 = 59.1%);
Unilaterally: 1 cadaver (1/22 = 4.5%) | Bilaterally: 12 cadavers (12/18 = 66.7%) | Bilaterally: 25 cadavers (25/40 = 62.5%);
Unilaterally; 1 (1/40 = 2.5%) | 51 specimens
(51/80 = 63.75%) |
|
| Separation of clavicular portion of PM | Bilaterally: 6 cadavers (6/22 = 27.3%) | Bilaterally: 5 cadavers (5/18 = 27.7%) | Bilaterally: 11 cadavers (11/40 = 27.5%) | 22 specimens
(22/80 = 27.5%) |
|
| Atypical division of PM (clavicular portion fused with upper fibers of sternocostal portion) | Unilaterally: 1 cadaver (1/22 = 4.5%) | - | Unilaterally: 1 cadaver (1/40 = 2.5%) | 1 specimen
(1/80 = 1.25%) |
|
| Hypotrophy of clavicular portion of PM | - | Bilaterally: 1 cadaver (1/18 = 5.6%) | Bilaterally: 1 cadaver (1/40 = 2.5%) | 2 specimens
(2/80 = 2.5%) |
|
| Fusion between the clavicular portion of PM and the deltoid muscle | Complete (absence of deltopectoral groove): 1 cadaver (1/22 = 4.5%);
Partial (deep fibers fused): 1 cadaver (1/22 = 4.5%)
Total: 2 cadavers (2/22 = 9.1%) | - | Complete (absence of deltopectoral groove): 1 cadaver (1/40 = 2.5%);
Partial (deep fibers fused): 1 cadaver (1/40 = 2.5%)
Total: 2 cadavers (2/40 = 5%) | Complete (absence of deltopectoral groove): 2 specimens (2/80 = 2.5%);
Partial (deep fibers fused): 2 specimens (2/80 = 2.5%);
Total incidence of fusion: 4 specimens (4/80 = 5%) |
|
| Presence of the sternalis muscle | - | Unilaterally: 1 cadaver (1/18 = 5.6%) | Unilaterally: 1 cadaver (1/40 = 2.5%) | 1 specimen
(1/80 = 1.25%) |
|
