EAS-EMG   US-EMG   simple phase interference phase mix phase simple-mix phase total simple phase interference phase mix phase simple-mix phase total MSA 7 4 19 4 34 7 2 18 4 31 Non-MSA 6 9 32 1 48 7 1 42 2 52 Likelihood ratioa 4.927 0.177 5.522 P value 0.137 aLikelihood ratio chi-square was used because theoretical frequency of six cells was less than 5.

Table 3: Comparison of recruited pattern when strong contraction between MSA and non-MSA groups.