Table 1.

Parameters relevant to each connection between populations and from inputs in the model

Population Name	Source Population Name	Postsynaptic Delta Efficacy, mV	Average Number of Incoming Connections to Each Neuron	Connection Delay Time, ms	Average Firing Rate Where Defined, Hz
MN-RF	Extensor Interneurons	−0.052	20	2
MN-VL	Extensor Interneurons	−0.052	20	2
MN-VM	Extensor Interneurons	−0.052	20	2
MN-ST	Extensor Interneurons	0.052	70	2
MN-BF	Extensor Interneurons	0.052	70	2
MN-RF	Flexor Interneurons	0.052	70	2
MN-VL	Flexor Interneurons	0.052	70	2
MN-VM	Flexor Interneurons	0.052	70	2
MN-ST	Flexor Interneurons	−0.052	20	2
MN-BF	Flexor Interneurons	−0.052	20	2
MN-RF	InhibRF	−0.052	70	2
Extensor Interneurons	Flexor Interneurons	−0.052	70	2
Flexor Interneurons	Extensor Interneurons	−0.052	70	2
Extensor Interneurons	Background	0.1	100	0	300
Flexor Interneurons	Background	0.1	100	0	300
InhibRF	Background	0.1	100	0	300
MN-RF	Background	0.1	100	0	320
MN-VL	Background	0.1	100	0	320
MN-VM	Background	0.1	100	0	320
MN-ST	Background	0.1	100	0	320
MN-BF	Background	0.1	100	0	320
MN-RF	Cortical drive	0.1	100	0	20*
MN-VL	Cortical drive	0.1	100	0	20
MN-VM	Cortical drive	0.1	100	0	20
MN-ST	Cortical drive	0.1	100	0	20
MN-BF	Cortical drive	0.1	100	0	20
Extensor Interneurons	Cortical drive	0.1	100	0	20
Flexor Interneurons	Cortical drive	0.1	100	0	20
Extensor Interneurons	senExtInt	0.1	100	0	0–15
Flexor Interneurons	senFlInt	0.1	100	0	0–150**
InhibRF	senInhRF	0.1	100	0	0–50**

Values for input activity are provided in the form of an average firing rate. MN, motor neuron; RF, rectus femoris; VL, vastus lateralis; VM, vastus medialis; ST, semitendinosus; BF, biceps femoris. *During the task, cortical drive input transitions from 0 Hz to these values then back to 0 Hz. **During the task, afferent activity transitions from 0 Hz to values in this range depending on the level of afferent feedback.