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Table 2 EMG activation pattern cross-correlations

From: Muscle activation patterns during walking from transtibial amputees recorded within the residual limb-prosthetic interface

0.7 m/s ρ X ¯ X i ρ X ¯ Y i ρ Y ¯ Y i
mean (sd) mean (sd) mean (sd)
Tibialis Anterior 0.73 (0.11) *° −0.33 (0.13) ° 0.44 (0.21) *
Gastrocnemius Medial Head 0.90 (0.09) *° 0.48 (0.42) ° 0.45 (0.32) *
Gastrocnemius Lateral Head 0.79 (0.17) *° 0.37 (0.40) ° 0.37 (0.35) *
Vastus Lateralis 0.81 (0.19) 0.83 (0.08) 0.89 (0.07)
Rectus Femoris 0.63 (0.28) 0.70 (0.23) 0.71 (0.18)
Biceps Femoris 0.75 (0.10) *° 0.31 (0.48) ° 0.35 (0.36) *
Gluteus Medius 0.72 (0.31) * 0.66 (0.32) 0.67 (0.28) *
1.0 m/s ρ X ¯ X i ρ X ¯ Y i ρ Y ¯ Y i
  mean (sd) mean (sd) mean (sd)
Tibialis Anterior 0.80 (0.09) *° −0.24 (0.08) ° 0.32 (0.25) *
Gastrocnemius Medial Head 0.87 (0.08) *° 0.23 (0.40) ° 0.20 (0.19) *
Gastrocnemius Lateral Head 0.83 (0.12) *° 0.20 (0.37) ° 0.24 (0.37) *
Vastus Lateralis 0.86 (0.08) 0.83 (0.10) 0.90 (0.06)
Rectus Femoris 0.77 (0.16) 0.70 (0.23) 0.70 (0.23)
Biceps Femoris 0.86 (0.06) *° 0.38 (0.39) ° 0.53 (0.30) *
Gluteus Medius 0.82 (0.14) * 0.63 (0.36) 0.61 (0.32) *
1.3 m/s ρ X ¯ X i ρ X ¯ Y i ρ Y ¯ Y i
  mean (sd) mean (sd) mean (sd)
Tibialis Anterior 0.84 (0.08) *° −0.09 (0.18) ° 0.20 (0.22) *
Gastrocnemius Medial Head 0.88 (0.07) *° 0.32 (0.26) ° 0.41 (0.24) *
Gastrocnemius Lateral Head 0.92 (0.07) *° 0.32 (0.26) ° 0.22 (0.32) *
Vastus Lateralis 0.89 (0.05) 0.84 (0.11) 0.84 (0.11)
Rectus Femoris 0.82 (0.15) 0.70 (0.23) 0.70 (0.23)
Biceps Femoris 0.89 (0.05) *° 0.33 (0.34) ° 0.55 (0.26) *
Gluteus Medius 0.77 (0.19) * 0.63 (0.38) 0.56 (0.35) *
1.6 m/s ρ X ¯ X i ρ X ¯ Y i ρ Y ¯ Y i
  mean (sd) mean (sd) mean (sd)
Tibialis Anterior 0.85 (0.07) *° −0.05 (0.36) ° 0.27 (0.28) *
Gastrocnemius Medial Head 0.88 (0.07) *° 0.48 (0.28) ° 0.53 (0.15) *
Gastrocnemius Lateral Head 0.91 (0.09) *° 0.40 (0.40) ° 0.46 (0.34) *
Vastus Lateralis 0.90 (0.06) 0.77 (0.20) 0.74 (0.15)
Rectus Femoris 0.74 (0.15) 0.58 (0.30) 0.66 (0.33)
Biceps Femoris 0.89 (0.07) *° 0.31 (0.26) ° 0.72 (0.13) *
Gluteus Medius 0.75 (0.18) * 0.50 (0.40) 0.45 (0.30) *
  1. X = controls, Y = amputees; *p < 0.001 for ρ X ¯ X i vs. ρ Y ¯ Y i ; °p < 0.001 for ρ X ¯ X i vs. ρ X ¯ Y i .