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Table 2 Median (1st quartile, 3rd quartile) for EMG parameters. Onset and TTP amplitude are in milliseconds. TA Tibialis anterior, GM Gluteus medius, RF Rectus femoris, VM Vastus medialis, VL Vastus lateralis, BF Biceps femoris, ST Semitendinosus. P(i) = perturbation number. asignificant difference between JHS and GJH, bsignificant difference between JHS and NF. Significance set at P < =.05

From: Adaptation of balance reactions following forward perturbations in people with joint hypermobility syndrome

  P1 P2 P6
JHS GJH NF JHS GJH NF JHS GJH NF
TA Onset (ms) 88 (79.3,96) 86 (76,99) 88 (82,99) 89 (80.8,93.5) 88.5 (75,97) 87.5 (76,103) 88 (79.5,94.3) 84 (73,91) 79 (76,89)
TTP (ms) 175 (119,298.5)b 119 (72,152) 101 (74,135) b 103 (85.5149.3) 99 (75,138) 89 (62,117) 108 (83.8134.8) 93.5 (73,121) 102 (82,119)
GM Onset (ms) 130 (113.5148.5) 116 (101,135) 130.5 (111,148) 131 (101.3154.3) 113 (85,135) 128 (114,153) 134 (68.5151) 128 (89,147) 129 (105,152)
TTP (ms) 167 (103.8226.5)a 78 (63,84)a 93.5 (68,129) 89 (75,149.8) 79.5 (35,101) 70.5 (56,89) 89 (45.8136.5)a 51.5 (22,82)a 60 (30,71)
RF Onset (ms) 117 (108,123.5) 110 (100,118) 119 (102,126) 116 (99,130.3) 110 (88,121) 113.5 (102,126) 107 (87,124.3) 108 (96,118) 112 (97,121)
TTP (ms) 153 (109.5196.5)b 99 (81,140) 82 (75,107) b 115 (84,231.3) 86 (69,99) 93 (74,104) 81 (59.5140.3) 80.5 (70,94) 79 (71,89)
VM Onset (ms) 121 (110,128.5) 118.5 (105,141) 126 (109,147) 118 (99.5136) 116 (100,149) 114.5 (97,133) 123 (92.3129.3) 115.5 (94,147) 115.5 (90,137)
TTP (ms) 133 (77,240)b 117.5 (83,150) 85.5 (68,100) b 93 (61.8196) 88 (74,114) 70 (45,101) 78 (46.3211.8) 70 (56,99) 56 (25,85)
VL Onset (ms) 114 (109.3132) 106.5 (94,114) 112.5 (102,123) 116 (103.5137.8) 109.5 (89,127) 116 (98,126) 116 (99.8123.5) 99.5 (92,127) 104 (91,120)
TTP (ms) 193 (114.5292.3)b 90 (73,125) 95 (77,122)b 140 (85,192.3) 88.5 (72,112) 88 (72,101) 79 (61.5147.5) 76 (66,84) 82.5 (68,93)
BF Onset (ms) 106 (97.8119.8) 95.5 (82,121) 108 (82,134) 110 (103,120) 96 (78,117) 103 (88,128) 106 (92.5141) 104.5 (83,123) 102.5 (66,134)
TTP (ms) 105 (82.8219.8) 100 (61,167) 99.5 (69,150) 127 (81.5156.3) 89 (66,123) 102 (84,148) 69 (53.8101.5) 70.5 (45,87) 77 (53,88)
ST Onset (ms) 99 (92.8111.3) 91 (84,115) 92.5 (75,153) 110 (88.3128.3) 91.5 (71,110) 105.5 (63,134) 120 (84.3141) 112.5 (86,133) 86 (59,142)
TTP (ms) 86 (69.3151) 91 (66,194) 100 (72,163) 98 (72,129.3) 85 (56,131) 81.5 (57,119) 67 (40,83) 61.5 (44,84) 82.5 (39,104)