Table 2 Success rates of detectable CMAPs (constant current versus constant voltage) during stimulation.
Stimulation | Wave amplitude | Upper limbs | Lower limbs | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pattern | L-APB | R-APB | L-Del | R-Del | L-AH | R-AH | L-TA | R-TA | L-GC | R-GC | L-Quad | R-Quad | ||
Pattern 1 | Constant-current | Less than/equal to 50 μV (cases) | 5 | 28 | 16 | 27 | 7 | 26 | 20 | 45 | 24 | 53 | 42 | 62 |
More than 50 μV (cases) | 90 | 67 | 79 | 68 | 88 | 69 | 75 | 50 | 71 | 42 | 53 | 33 | ||
Success rate (%) | 94.7 | 70.5 | 83.2 | 71.6 | 92.6 | 72.6 | 78.9 | 52.6 | 74.7 | 44.2 | 55.8 | 34.7 | ||
Right v. left success rate p values | <0.01 | 0.057 | <0.01 | <0.01 | <0.01 | <0.01 | ||||||||
right: anode, left cathode | Constant-voltage | Less than/equal to 50 μV (cases) | 7 | 4 | 10 | 8 | 1 | 4 | 11 | 10 | 15 | 19 | 29 | 34 |
More than 50 μV (cases) | 88 | 91 | 85 | 87 | 94 | 91 | 84 | 85 | 80 | 76 | 66 | 61 | ||
Success rate (%) | 92.6 | 95.8 | 89.5 | 91.6 | 98.9 | 95.8 | 88.4 | 89.5 | 84.2 | 80.0 | 69.5 | 64.2 | ||
Right v. left success rate p values | 0.35 | 0.62 | 0.17 | 0.82 | 0.45 | 0.44 | ||||||||
Constant-current v. constant-voltage success rate p values | 0.6 | <0.01 | 0.2 | <0.01 | 0.03 | <0.01 | 0.1 | <0.01 | 0.1 | <0.01 | 0.1 | <0.01 | ||
Pattern 2 | Constant-current | Less than/equal to 50 μV (cases) | 26 | 10 | 34 | 14 | 32 | 15 | 47 | 26 | 52 | 26 | 64 | 51 |
More than 50 μV (cases) | 69 | 85 | 61 | 81 | 63 | 80 | 48 | 69 | 43 | 69 | 31 | 44 | ||
Success rate (%) | 72.6 | 89.5 | 64.2 | 85.3 | 66.3 | 84.2 | 50.5 | 72.6 | 45.3 | 72.6 | 32.6 | 46.3 | ||
Right v. left success rate p values | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | 0.054 | ||||||||
right: cathode, left: anode | Constant-voltage | Less than/equal to 50 μV (cases) | 7 | 4 | 6 | 5 | 3 | 2 | 14 | 16 | 17 | 16 | 28 | 36 |
More than 50 μV (cases) | 88 | 91 | 89 | 90 | 92 | 93 | 81 | 79 | 78 | 79 | 67 | 59 | ||
Success rate (%) | 92.6 | 95.8 | 93.7 | 94.7 | 96.8 | 97.9 | 85.3 | 83.2 | 82.1 | 83.2 | 70.5 | 62.1 | ||
Right v. left success rate p values | 0.35 | 0.76 | 0.65 | 0.69 | 0.85 | 0.22 | ||||||||
Constant-current v. constant-voltage p values | <0.01 | 0.10 | <0.01 | 0.03 | <0.01 | 0.001 | <0.01 | 0.08 | <0.01 | 0.08 | <0.01 | 0.03 | ||
