Table 1.

Delays in the simulations for each of voluntary drive levels

	I1 = 3.5 nA	I1 = 4.5 nA	I1 = 5.5 nA
Motoneuron CST to force	82.1 ± 2.2 ms	86.0 ± 0.4 ms	84.4 ± 0.6 ms
Force to muscle-shortening velocity	48.1 ± 5.4 ms	37.8 ± 2.4 ms	26.7 ± 1.6 ms
Muscle shortening to muscle lengthening	131.7 ms	99.3 ms	100.2 ms
Muscle-lengthening velocity to Ia CST	−12.4 ± 4.0 ms	−31.9 ± 4.0 ms	−27.7 ± 1.4 ms
Ia conduction	7.5 ms	7.5 ms	7.5 ms
Average total efferent–afferent delay	257.0 ms	198.7 ms	191.1 ms

All the delays were computed using the cross-correlation function. Note that the muscle-shortening to muscle-lengthening time was not half a tremor cycle (100 ms) because the profile of the generated movement was not perfectly sinusoidal. The Ia CST was obtained by adding up the spikes of all the Ia neurons, similarly to the motoneuron CST.