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Table 2 Myoelectric values expressed in micro volts (μV) for test and control muscles during Simulated Mills Manipulation

From: Effect of glenohumeral forward flexion on upper limb myoelectric activity during simulated mills manipulation; relations to peripheral nerve biomechanics

 

Standard Mills position

Varied position

Mean percentage change in myoelectric activity

P value

Observed power

Effect size

Test muscles

Brachioradialis

Mean 13.71 (SD 16.34)

Mean 1.63 (SD 0.61)

−88.1%

≤.001

0.99

0.73

Biceps Brachii

Mean 14.44 (SD 21.2)

Mean 2.26 (SD 0.80)

−84.56%

≤.001

1

0.58

Upper Trapezius

Mean 134.63 (SD 99.51)

Mean 37.08 (SD 33.58)

−72.46%

≤.001

1

1.31

Triceps Brachii

Mean 28.71 (SD 20.67)

Mean 8.98 (SD 6.46)

−68.73%

≤.001

1

1.27

Pectoralis Major

Mean 9.64 (SD 3)

Mean 6.34 (SD 2.92)

−34.18%

≤.001

0.99

1.14

Non-protective muscle

Lower Trapezius

Mean 12.22 (SD 7.26)

Mean 24.71 (SD 21.64)

+102.25%

≤.001

0.92

0.63