Table 1.
Values of CMAP recorded from the upper TM: two different procedures.
| n = 35 | (CMAP-A) TM |
(CMAP-B) TM + 2 cm |
P value | ||||
|---|---|---|---|---|---|---|---|
| Mean | SD | CoV | Mean | SD | CoV | ||
| onset latency (ms) | 2.6 | 0.4 | 0.15 | 2.6 | 0.4 | 0.15 | 0.73 |
| peak-to-peak amplitude (mV) | 11.0 | 4.0 | 0.36 | 14.4 | 4.9 | 0.34 | <0.01 |
| baseline-to-peak amplitude (mV) | 6.2 | 2.4 | 0.39 | 8.2 | 2.8 | 0.34 | <0.01 |
| duration (ms) | 14.5 | 1.6 | 0.11 | 13.1 | 1.3 | 0.1 | <0.01 |
| rise time (ms) | 6.3 | 2.8 | 0.44 | 2.1 | 0.4 | 0.19 | <0.01 |
CMAP, compound muscle action potential; CoV, coefficient of variation; SD, standard deviation; TM, trapezius muscle.