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
| 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) | |