TABLE 6.
Results for time- and frequency-domain features of EMG data
| Parameter | Bipedal stance | Dominant leg stance | Non-dominant leg stance | |||||
|---|---|---|---|---|---|---|---|---|
| L | R | L | R | L | R | |||
| D | ND | D | ND | D | D | ND | ND | |
| med. gastr. | ||||||||
| AAC (μV) | 4.93 (5.30) | 3.53 (3.28) | 2.60 (1.12) | 4.00 (2.85) | 15.62 (7.38) | 16.32 (6.85)† | 13.24 (5.63) | 20.40 (8.29)† |
| DABS_M (μV) | 4.93 (5.30) | 3.53 (3.28) | 2.60 (1.12) | 4.00 (2.85) | 15.62 (7.38) | 16.32 (6.85)† | 13.24 (5.63) | 20.40 (8.29)† |
| ENH_WL | 2.40 • 105 (1.61 • 105) | 1.98 • 105 (1.09 • 105) | 1.65 • 105 (0.38 • 105) | 2.11 • 105 (0.91 • 105) | 5.3 • 105 (1.83 • 105) | 5.3 • 105 (1.79 • 105)† | 4.8 • 105* (1.42 • 105) | 6.6 • 105 (1.91 • 105)*† |
| INT_EMG (μV) | 1.10 • 105 (1.28 • 105) | 7.79 • 105 (8.45 • 105) | 5.39 • 105 (3.10 • 105) | 9.40 • 105 (8.00 • 105) | 4.1 • 105 (2.01 • 105) | 4.5 • 105 (2.30 • 105)† | 3.5 • 105* (1.33 • 105) | 5.7 • 105 (2.31 • 105)*† |
| LOG_TK_EO | 15.30 (1.81) | 14.74 (1.50) | 14.57 (1.10) | 15.23 (1.52) | 18.36 (1.05) | 18.34 (1.24)† | 18.14 (0.66) | 18.84 (1.06)† |
| MFL (μV) | 3.21 (0.38) | 3.09 (0.32) | 3.06 (0.23) | 3.20 (0.32) | 3.86 (0.23) | 3.86 (0.27)† | 3.82 (0.14) | 3.97 (0.23)† |
| WL (μV) | 4.93 • 105 (5.30 • 105) | 3.53 • 105 (3.28 • 105) | 2.60 • 105 (1.12 • 105) | 4.00 • 105 (2.85 • 105) | 15.6 • 105 (7.38 • 105) | 15.7 • 105 (6.95 • 105)† | 13.2 • 105 (5.63 • 105) | 20.4 • 105 (8.29 • 105)† |
* between-group differences during dominant/non-dominant leg stance (p < 0.05); † within-group differences between dominant and nondominant leg stance (p < 0.05)
For further details on the analyzed parameters, please see Table 3.
Values are mean (SD) of each variables. Only those EMG variables are included in which significant difference were found between or within the groups during bi- or unilateral stance. Note that ENH_WL and LOG_TK_EO are unitless.
AAC, Average Amplitude Change; DABS_M, Difference Absolute Mean Value; ENH_WL, Enhanced Wavelength; INT_EMG, Integrated EMG; LOG_TK_EO, Log Teager Kaiser Energy Opertor; MFL, Maximum Fractal Length; WL, Waveform Length.