Skip to main content
. Author manuscript; available in PMC: 2010 Aug 1.
Published in final edited form as: Muscle Nerve. 2009 Aug;40(2):231–239. doi: 10.1002/mus.21224

Table 1.

Ranked correlation coefficients of the six EMG amplitudes for all subjects and correlations between EMG2 and supination-pronation torque.

subject 1 2 3 4 5 6 7 8 9 10

EMGi-EMGi mean range
1-2 0.00 0.31 -0.02 0.62 0.51 0.10 0.26 0.56 0.87 0.97 0.42 0.99
1-3 0.30 -0.15 0.01 0.78 0.58 0.12 0.96 0.86 0.84 0.97 0.53 1.12
1-4 -0.07 0.44 0.39 0.59 0.65 0.64 0.26 0.46 0.96 0.96 0.53 1.03
1-5 0.19 -0.12 -0.04 0.60 0.34 0.10 0.89 0.86 0.79 0.79 0.44 1.01
1-6 -0.06 0.43 0.30 0.43 0.46 0.72 0.28 0.38 0.73 0.81 0.45 0.86

2-3 0.73 0.87 0.90 0.61 0.78 0.89 0.94 0.93 0.69 0.84 0.82 0.33
2-4 0.25 0.20 -0.02 0.36 0.34 0.10 0.87 0.81 0.80 0.82 0.45 0.89
2-5 -0.07 0.65 0.52 0.18 0.70 0.70 0.32 0.43 0.94 0.80 0.52 1.01
2-6 0.60 0.45 0.76 0.32 0.55 0.69 0.81 0.81 0.91 0.81 0.67 0.59

3-4 0.51 0.44 0.67 0.42 0.45 0.73 0.77 0.75 0.66 0.76 0.62 0.36
3-5 0.25 0.04 -0.04 0.52 0.29 0.14 0.59 0.85 0.74 0.87 0.42 0.91
3-6 -0.04 0.36 0.45 0.39 0.37 0.59 0.21 0.53 0.82 0.84 0.45 0.88

4-5 0.59 0.43 0.87 0.43 0.38 0.82 0.58 0.90 0.76 0.87 0.66 0.52
4-6 0.31 0.28 0.78 0.44 0.32 0.82 0.58 0.86 0.72 0.76 0.59 0.57

5-6 0.48 0.42 0.76 0.50 0.47 0.52 0.55 0.84 0.73 0.92 0.62 0.50

mean 0.26 0.34 0.42 0.48 0.48 0.51 0.59 0.72 0.80 0.85 0.55
range 0.80 1.02 0.94 0.60 0.49 0.79 0.75 0.55 0.30 0.21 0.40
EMG2-Sup./Pro. 0.37 0.29 0.26 0.12 0.18 0.31 0.73 0.29 0.51 0.36 0.34 0.61

Each row lists the correlation coefficients for one pair of EMG recordings, with the numbers corresponding to the traces in Figure 1: intramuscular recordings for brachialis (1) and the long head of biceps brachii (2), and surface recordings for the long (3) and short (4) heads of biceps brachii, brachioradialis (5), and triceps brachii (6). The last row shows the correlations between the change in EMG amplitude of biceps brachii long head and supination-pronation torque.