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
C3 C4 C3 C4
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 p Rt hand imagery p
(n= 11) C3 C4 C3 C4
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)

A: ERD and its frequencies in each hemisphere within each group.

B: Age, ERD, and its frequencies compared between ALS and control groups.

Kasahara et al.

Kasahara et al. BMC Neuroscience 2012 13:66   doi:10.1186/1471-2202-13-66

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