Table 3 Comparison of ERD and its frequencies across hemispheres within each group and between the ALS and control groups
A. ALS (n= 8) | Lt hand imagery | p | Rt hand imagery | p | ||
|---|---|---|---|---|---|---|
| Â | C3 | C4 | Â | C3 | C4 | Â |
ERD (%) | 87.1±7.0 | 85.9± 8.9 | 0.35 | 85.1±11.0 | 83.3±10.1 | 0.74 |
Frequency (Hz) | 15.5± 4.2 | 15.1±4.2 | 0.67 | 18.3± 6.8 | 15.9± 4.0 | 0.53 |
control | Lt hand imagery | Â | p | Rt hand imagery | Â | p |
(n= 11) | C3 | C4 | Â | C3 | C4 | Â |
ERD (%) | 67.4±18.4 | 62.8±17.9 | 0.22 | 66.8±20.8 | 69.5±20.8 | 0.45 |
Frequency (Hz) | 14.7± 4.5 | 14.9±4.3 | 0.96 | 15.9± 4.8 | 12.6± 4.3 | 0.06 |
(Wilcoxon sign rank test) | ||||||
B. group | ALS (n= 8) | Control (n= 11) | p | |||
Age (years) | 66.3 ±13.5 | 67.0 ± 3.7 | 0.84 | |||
ERD (%) | 85.3±9.0 | 66.6±19.0 | 0.00 | |||
Frequency (Hz) | 16.2±4.9 | 14.5±4.5 | 0.23 | |||
Significant results are highlighted in bold | Degree of freedom: 19 (Mann-Whitney U test) | |||||