Table 2 Post-hoc test of values within each muscle either in the surgical neck or greater tuberosity model.

From: Optimal immobilization position for conservative treatment of proximal humerus fractures by fracture type: a biomechanical cadaveric study

 

Arm movement

P-value

Pectoralis major muscle, clavicular head

1.0 ± 0.4 (ER 0°–30°) vs. 2.0 ± 0.7 (ER 0°–60°)

0.006

2.0 ± 0.7 (ER 0°–60°) vs. 3.7 ± 1.0 (ER 0°–90°)

0.006

3.7 ± 1.0 (ER 0°–90°) vs. 1.0 ± 0.4 (ER 0°–30°)

0.006

Pectoralis major muscle, sternocostal head

1.4 ± 0.6 (ER 0°–30°) vs. 2.7 ± 0.9 (ER 0°–60°)

0.006

2.7 ± 0.9 (ER 0°–60°) vs. 4.6 ± 1.3 (ER 0°–90°)

0.006

4.6 ± 1.3 (ER 0°–90°) vs. 1.4 ± 0.6 (ER 0°–30°)

0.006

Supraspinatus muscle

0.5 ± 0.3 (Abd 45°–30°) vs. 1.2 ± 0.3 (Abd 45°–15°)

0.006

1.2 ± 0.3 (Abd 45°–15°) vs. 2.2 ± 0.4 (Abd 45°–0°)

0.006

2.2 ± 0.4 (Abd 45°–0°) vs. 0.5 ± 0.3 (Abd 45°–30°)

0.006

Infraspinatus muscle

1.4 ± 0.5 (IR 0°–30°) vs. 2.5 ± 0.9 (IR 0°–60°)

0.006

2.5 ± 0.9 (IR 0°–60°) vs. 3.8 ± 1.4 (IR 0°–90°)

0.006

3.8 ± 1.4 (IR 0°–90°) vs. 1.4 ± 0.5 (IR 0°–30°)

0.006

  1. The values are presented as mean and standard deviation. ER External rotation, Abd Abduction, IR Internal rotation.