Anatomical Variations of the Pectoralis Major Muscle: Notes on Their Impact on Pectoral Nerve Innervation Patterns and Discussion on Their Clinical Relevance
Table 3
Morphometric characteristics of the pectoralis major muscle (PM).
The width of the origin of the sternocostal part of PM [mm]
Minimal value
Maximal value
Mean
Median
Standard deviation
Male cadavers
160
215
182
185
17
Female cadavers
133
181
156
154
19
Total
133
215
172
177
22
The width of the PM in the midclavicular line (measured to the level of inferior border of the muscle) [mm]
Minimal value
Maximal value
Mean
Median
Standard deviation
Male cadavers
172
224
196
194
16
Female cadavers
173
223
194
191
16
Total
172
224
196
194
15
Asymmetry of the width of the PM in the midclavicular line [%]
Minimal value
Maximal value
Mean
Median
Standard deviation
Male cadavers
1.6
17.9
7.3
3.4
6.2
Female cadavers
1.4
12.1
6.4
6.3
4
Total
1.4
17.9
6.9
5.2
5.2
The width of the insertion of PM [mm]
Minimal value
Maximal value
Mean
Median
Standard deviation
Male cadavers
53.8
83.2
66.7
66
9.7
Female cadavers
43.9
78.3
62.9
60.3
10.2
Total
43.9
83.2
65.3
63.6
9.8
The distance between the top of the greater tubercle and upper border of PM tendon [mm]