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. 2014 Apr 23;112(3):525–542. doi: 10.1152/jn.00490.2013

Table 2.

Model parameters for EC and EO conditions from fits to across-subject mean FRFs

Narrow Stance
 Parallel Stance
 Medium Stance
 Wide Stance
Parameter Units EC/EO 1° 2° 4° 1° 2° 4° 1° 2° 4° 1° 2° 4°
KLl N.m.rad−1 EC −68 153 356 −181 −29 179 −27 69 167 243 74 171
EO 231 473 609 40 194 337 103 168 135 200 188 217
KLsl N.m.rad−1 EC 919 736 554 850 730 527 566 476 356 122 378 254
EO 614 426 316 651 480 383 469 360 389 220 248 247
KLi* N.m.rad−1 EC 2.6 2.6 2.6 4.1 4.1 4.1 1.4 1.4 1.4 4.4 4.4 4.4
EO 8.0 8.0 8.0 2.9 2.9 2.9 0.2 0.2 0.2 9.9 9.9 9.9
BLl N.m.s.rad−1 EC 188 183 180 128 134 119 41 46 42 −38 12 −9.4
EO 221 256 278 137 144 193 73 83 115 −1.1 16 25
BLsl N.m.s.rad−1 EC 128 121 111 157 150 152 169 161 166 162 144 160
EO 114 107 92 152 126 110 176 150 127 146 147 120
BLlu N.m.s.rad−1 EC 222 166 150 174 158 133 106 96 97 33 44 39
EO 211 194 170 176 128 122 134 105 94 39 50 31
BLi* N.m.s.rad−1 EC 0.1 0.1 0.1 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1
EO 0.4 0.4 0.4 0.1 0.1 0.1 0 0 0 0.2 0.2 0.2
τL* ms EC 117 117 117 114 114 114 113 113 113 104 104 104
EO 118 118 118 113 113 113 110 110 110 107 107 107
GLt N.m/N.m EC 2.2 2.5 2.2 1.9 1.5 1.3 1.0 0.8 0.6 0 0.5 0.3
EO 2.0 2.2 2.0 1.1 1.1 0.9 0.5 0.5 0.7 0.3 0.3 0.2
τLt* s EC 12 12 12 7.4 7.4 7.4 7.1 7.1 7.1 3.5 3.5 3.5
EO 12 12 12 7.7 7.7 7.7 4.8 4.8 4.8 12 12 12
KUu N.m.rad−1 EC −6.4 13 17 −42 −19 4.5 −113 −56 −33 −45 −37 −101
EO 55 74 112 24 21 79 34 51 49 27 36 142
KUpu N.m.rad−1 EC 242 142 82 291 218 157 254 196 198 121 247 320
EO 307 262 164 241 116 108 212 150 138 93 114 234
KUlu N.m.rad−1 EC −18 −48 −76 87 23 −10 191 104 105 83 202 292
EO 17 −1.8 −64 57 −13 −41 109 50 36 47 38 84
KUi* N.m.rad−1 EC 92 92 92 46 46 46 28 28 28 9 9 9
EO 77 77 77 57 57 57 45 45 45 37 37 37
BUu N.m.s.rad−1 EC 46 39 34 57 51 47 73 66 73 42 95 119
EO 51 59 55 47 45 56 58 58 64 42 45 105
BUlu N.m.s.rad−1 EC −11 −8.8 −6.4 −20 −18 −20 −33 −31 −37 −19 −51 −66
EO −18 −24 −25 −16 −18 −28 −25 −28 −33 −18 −25 −56
BUi* N.m.s.rad−1 EC 14 14 14 12 12 12 10 10 10 7.5 7.5 7.5
EO 14 14 14 11 11 11 7.7 7.7 7.7 5.7 5.7 5.7
τU* ms EC 98 98 98 85 85 85 71 71 71 46 46 46
EO 76 76 76 74 74 74 70 70 70 45 45 45
GUt N.m/N.m EC 1.8 1.1 1.1 2.5 1.9 1.8 2.8 2.3 2.6 2.0 3.9 4.7
EO 0.8 2.1 1.6 1.5 2.1 2.2 1.2 1.9 2.9 2.2 2.2 5.3
τUt* s EC 3.3 3.3 3.3 2.6 2.6 2.6 1.0 1.0 1.0 1.9 1.9 1.9
EO 4.9 4.9 4.9 4.7 4.7 4.7 3.5 3.5 3.5 5.8 5.8 5.8

Values are model parameters for EC and EO conditions from fits to across-subject mean frequency-response functions (FRFs) at 1°, 2°, and 4° peak-to-peak stimulus amplitudes for 4 different stance widths.

*

Parameters that were constrained to have equal values across the 3 peak-to-peak stimulus amplitudes for each stance width. All other parameters were free to vary across stimulus amplitude and stance width.