Experimental Implementation of Automatic Control of Posture-Dependent Stimulation in an Implanted Standing Neuroprosthesis

Table 1

Muscle pulse amplitudes and pulse widths for baseline standing. Muscles that were always recruited for baseline standing are indicated with a “P”, while those recruited by the controller are indicated with a “C.” Muscles that were supplemented with surface electrodes are indicated with a “”.

Muscle	Function	Pulse amplitude (mA)	Baseline standing PW (μs)	Threshold PW (μs)	Saturation PW (μs)
Right gluteus maximus (right GMX)	P	20.0	248	2	250
Right hamstring (right HM)	P	20.0	250	64	250
Left gluteus maximus (left GMX)	P	20.0	145	5	150
Left gluteus medius (left GMED)	C	20.0	61.5	13	110
Right quadratus lumborum (right QL)	—	—	—	—	—
Right erector spinae (right ES)	P	2.1	90	10	125
Left quadratus lumborum (left QL)	—	18.0	0	10	50
Left erector spinae (left ES)	—	18.0	0	35	70
Right quadriceps 1 (right QD 1)	P	0.8	90	30	90
Right quadriceps 2 (right QD 2)	P	0.8	90	24	90
Left quadriceps 1 (left QD 1)	P	0.8	250	64	250
Left quadriceps 2 (left QD 2)	P	0.8	250	48	250
Right quadriceps 3 (right QD 3)	P	0.8	100	32	100
Right posterior adductor (right PA)	C	20.0	86	2	170
Left quadriceps 3 (left QD 3)	P	0.8	250	72	250
Left posterior adductor (left PA)	C	20.0	128.5	7	250
Right gluteus medius (right GMED)	C	100.0	0	80	250
Right tibialis anterior (right TA)	C	30.0	0	80	100
Right gastrocnemius (right GS)	C	100.0	0	20	65
Left tibialis anterior (left TA)	C	30.0	0	70	90
Left gastrocnemius (left GS)	C	100.0	0	30	70