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Table 4 Sternocleidomastoid and upper trapezius muscle activities during bilateral arm elevation task: mean (sd)

From: Influence of pain location and hand dominance on scapular kinematics and EMG activities: an exploratory study

Sternocleidomastoid muscle
Side Humeral elevation angle (°) Pain on dominant side (n = 9) Pain on non-dominant side (n = 9) Pain on both sides (n = 12)
Dominant side 30-60 13.23 (7.33) 15.73 (10.64) 19.35 (15.77)
  60-90 17.1 (7.81) 18.98 (8.83) 24.26 (16.21)
  90-120 24.83 (15.42) 32.4 (10.19) 33.76 (18.79)
  120-90 27.62 (20.79) 24.35 (12.09) 23.28 (16.47)
  90-60 23.04 (19.00) 20.81 (12.94) 19.25 (15.22)
  60-30 15.62 (10.12) 14.87 (8.92) 15.55 (12.05)
Non-dominant side 30-60 19.11 (8.40) 19.09 (11.41) 15.07 (8.36)
  60-90 23.36 (8.88) 26.49 (14.31) 19.44 (9.55)
  90-120 29.21 (10.97) 38.68 (19.07) 30.62 (12.03)
  120-90 21.09 (9.55) 24.79 (12.16) 20.13 (8.81)
  90-60 16.67 (9.12) 19.87 (10.62) 16.03 (8.74)
  60-30 13.87 (7.91) 14.54 (9.07) 12.33 (8.27)
Upper trapezius muscle
Side Humeral elevation angle (°) Pain on dominant side (n = 9) Pain on non-dominant side (n = 9) Pain on both sides (n = 12)
Dominant side 30-60 38.05 (19.72) 32.81 (12.94) 34.74 (14.53)
  60-90 50.50 (10.86) 40.51 (17.85) 41.14 (14.09)
  90-120 56.33 (11.27) 48.99 (14.37) 51.06 (14.59)
  120-90 28.26 (7.24) 29.76 (9.56) 29.55 (8.36)
  90-60 19.46 (10.69) 23.87 (10.27) 24.64 (8.08)
  60-30 10.02 (9.01) 13.42 (6.86) 15.58 (7.66)
Non-dominant side 30-60 37.44 (17.86) 38.24 (12.05) 33.17 (10.59)
  60-90 46.10 (8.14) 41.87 (16.88) 37.76 (10.63)
  90-120 52.03 (7.97) 46.54 (13.66) 46.47 (8.68)
  120-90 27.33 (8.74) 28.08 (9.98) 24.28 (6.62)
  90-60 18.30 (10.81) 23.29 (9.94) 19.24 (7.91)
  60-30 7.65 (6.99) 10.32 (8.23) 8.19 (5.79)