TABLE 2.
ANOVA P values for EMG response to peak acceleration and peak velocity
| Muscle | Forward Perturbations |
Backward Perturbations | ||||||
|---|---|---|---|---|---|---|---|---|
| Initial Burst |
Plateau Region | Initial Burst | Plateau Region | |||||
| Peak Accel | Peak Velo | Peak Accel | Peak Velo | Peak Accel | Peak Velo | Peak Accel | Peak Velo | |
| TA-L | <10−16 | 0.009 | 0.089 | <10−16 | <10−15 | 0.54 | <10−6 | <10−8 |
| MG-L | <10−3 | 0.76 | 0.42 | <10−3 | <10−4 | 0.016 | <10−4 | <10−12 |
| TA-R | <10−15 | 0.03 | 0.26 | <10−16 | <10−8 | 0.39 | 0.002 | <10−9 |
| MG-R | <10−5 | 0.09 | 0.001 | <10−9 | <10−6 | 0.77 | <10−4 | <10−9 |
| SOL | <10−5 | <10−5 | 0.11 | 0.005 | <10−8 | 0.002 | 0.002 | <10−16 |
| VLAT | <10−6 | 0.64 | 0.009 | <10−9 | <10−4 | 0.092 | <10−4 | <10−8 |
| RFEM | <10−16 | 0.40 | 0.010 | 0.002 | <10−6 | 0.001 | 0.001 | <10−8 |
| SEMB | <10−15 | <10−3 | 0.092 | <10−10 | <10−15 | 0.039 | <10−10 | <10−16 |
| SEMT | <10−14 | 0.001 | 0.040 | <10−9 | <10−16 | 0.22 | <10−6 | <10−16 |
| BFLH | <10−10 | 0.004 | 0.26 | <10−10 | <10−6 | 0.54 | 0.031 | 0.0031 |
| BFSH | <10−10 | 0.018 | 0.41 | <10−9 | <10−15 | 0.18 | 0.017 | <10−3 |
| ES-L | <10−7 | 0.006 | 0.23 | 0.20 | 0.0022 | 0.10 | <10−4 | <10−16 |
| ES-R | <10−6 | 0.007 | 0.058 | 0.004 | <10−4 | 0.89 | <10−3 | <10−10 |
| RA-L | <10−6 | 0.42 | 0.005 | <10−8 | <10−7 | 0.10 | 0.13 | <10−5 |
| RA-R | <10−3 | 0.47 | 0.71 | <10−5 | <10−6 | 0.35 | 0.008 | 0.002 |
P values indicated in bold are significant at P < 0.0125 for n = 4 comparisons. For all muscles during all periods, the subject factor was significant (P < 10−5) and the interactions between velocity and acceleration were not significant (P > 0.045).