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Table 2 Results from surface electromyography, maximal isometric voluntary contraction and pattern differentiation

From: Immediate effects of acupuncture on biceps brachii muscle function in healthy and post-stroke subjects

  Healthy subjects Post-stroke patients
  LI11 PC2 LI11 PC2
Maximal isometric voluntary force (kg)
   Pre-intervention 22.2 ± 10.7 18.8 ± 4.6 9.6 ± 3.9 10.7 ± 5.6
   Post-intervention 21.7 ± 9.5 18.7 ± 6.0 9.6 ± 4.7 10.2 ± 5.3
   P (post × pre) 0.288 0.468 0.499 0.251
   P (ΔMIVC LI11 × PC2) 0.340 0.303
Root mean square value (V)
   Baseline noise 0.105 ± 0.010 0.115 ± 0.026 0.202 ± 0.085 0.179 ± 0.052
   Pre-intervention 1.392 ± 0.826 1.494 ± 0.826 0.627 ± 0.335 0.601 ± 0.258
   Post-intervention 0.612 ± 0.320 0.623 ± 0.320 0.530 ± 0.272 0.591 ± 0.326
   P (post × pre) 0.002 0.001 0.187 0.398
   P (ΔRMS LI11 × PC2) 0.391 0.220
Identified pattern
   Fire heat 0 (0%) 3 (18%) 3 (43%) 4 (50%)
   Phlegm dampness 7 (47%) 6 (35%) 2 (29%) 2 (25%)
   Qi deficiency 7 (47%) 6 (35%) 1 (14%) 1 (13%)
   Yin deficiency 1 (7%) 2 (12%) 1 (14%) 1 (13%)
   P (healthy × patients) χ2 = 9.759; P = 0.021