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Table 2 Stimulation pulse-widths us for each subject

From: A neuroprosthesis for control of seated balance after spinal cord injury

Muscle

Side

S1

S2

S3

S4

S5

Baseline

High

Baseline

High

Baseline

High

Baseline

High

Baseline

High

Erector spinae

Right

75

100

75

34

100

150

50

250

63

250

Left

130

250

112

30

100

250

50

130

63

250

Quadratus lumborum

Right

250

250

34

90

N/A

N/A

N/A

N/A

N/A

N/A

Left

250

30

30

30

N/A

N/A

N/A

N/A

N/A

N/A

Iliopsoas

Right

N/A

N/A

0

0

N/A

N/A

N/A

N/A

N/A

N/A

Left

N/A

N/A

0

0

N/A

N/A

N/A

N/A

N/A

N/A

Gluteus maximus

Right

200

250

62

75

60

120

250

250

100

250

Left

40

250

75,7

112,250

60

250

250

250

80

250

Semimembranosus

Right

0

250

7

250

100

250

0

250

250

250

Left

0

250

12,1

150,70

100

250

0

250

250

250

Posterior adductors

Right

50

250

6

250

75

250

0

200

250

250

Left

55

200

1

250

75

225

0

250

250

250

Gluteus medius

Right

N/A

N/A

0

0

60

60

N/A

N/A

N/A

N/A

Left

N/A

N/A

0

0

60

60

N/A

N/A

N/A

N/A

  1. The ‘Baseline’ values were those used for steady state erect sitting while the ‘High’ values were those applied whenever the trunk crossed the flexion threshold. An ‘N/A’ entry implies that electrodes were not implanted to activate the muscle in that subject. Multiple entries in a cell mean that there are multiple electrodes to activate the muscle and each is controlled independently.