Table 1

Perturbation amplitudes, scaling of the perturbation signal, Goodness of Fit and Noise-to-Signal Ratios of the model simulations and the balance control experiment
Simulations Experiment
PLT-Nn PLT-N 2F-Nn 2F-N PL-Nn PL-N HC HC mean PD patient
Signal Amplitude PL: 0.06; T: 20Nm PL: 0.06m; T: 16Nm 20N 20N 0.12m 0.12m PL: 0.07; T: 18.4Nm PL: 0.06m; T: 16Nm PL: 0.06; T: 20Nm
Scaling PL: 1/f PL: 1/f - - 1/f 1/f PL: 1/f PL: 1/f PL: 1/f
GOF (1/Hz2)
<a onClick="popup('http://www.jneuroengrehab.com/content/10/1/23/mathml/M2','MathML',630,470);return false;" target="_blank" href="http://www.jneuroengrehab.com/content/10/1/23/mathml/M2">View MathML</a> 1.11 11.64 1.11 23.64 26.44 29.83 - - -
<a onClick="popup('http://www.jneuroengrehab.com/content/10/1/23/mathml/M3','MathML',630,470);return false;" target="_blank" href="http://www.jneuroengrehab.com/content/10/1/23/mathml/M3">View MathML</a> 0.25 4.99 0.25 7.16 21.56 22.59 - - -
<a onClick="popup('http://www.jneuroengrehab.com/content/10/1/23/mathml/M4','MathML',630,470);return false;" target="_blank" href="http://www.jneuroengrehab.com/content/10/1/23/mathml/M4">View MathML</a> 0.79 7.30 0.79 14.42 28.18 36.09 - - -
<a onClick="popup('http://www.jneuroengrehab.com/content/10/1/23/mathml/M5','MathML',630,470);return false;" target="_blank" href="http://www.jneuroengrehab.com/content/10/1/23/mathml/M5">View MathML</a> 0.25 2.94 0.25 4.38 12.51 14.55 - - -
NSR
TA 0 0.54 0 0.43 0 1.17 0.55 0.24 0.11
TH 0 0.39 0 0.10 0 0.59 0.08 0.28 0.06
”®sway - - - - - - 0.10 0.15 0.08

GOF goodness of fit, NSR noise-to-signal ratio averaged over the two perturbation rounds, PL platform, T torque. Amplitude values are given in peak-to-peak values. f are the frequencies of the perturbation signals.

The GOF is reported for each estimate of the model transfer function <a onClick="popup('http://www.jneuroengrehab.com/content/10/1/23/mathml/M1','MathML',630,470);return false;" target="_blank" href="http://www.jneuroengrehab.com/content/10/1/23/mathml/M1">View MathML</a>. The median NSR is reported for the input (joint torques) and output (joint angles) for the model simulations and the balance control experiment, averaged over the two perturbation rounds. Six perturbation conditions were simulated: a platform translation+perturbation torque without and with noise (PLT-Nn and PLT-N), two perturbation forces with and without noise (2F-Nn and 2F-N) and a platform translation with and without noise (PL-N and PL-Nn). For the balance control experiment, the median NSRs of one representative healthy control (HC), the average of the healthy controls and of the PD patient are shown.

Boonstra et al.

Boonstra et al. Journal of NeuroEngineering and Rehabilitation 2013 10:23   doi:10.1186/1743-0003-10-23

Open Data