Skip to main content

Table 3 Highest strength obtained for each movement using an adapted Medical Research Council (MRC) scale. This table presents the highest MRC grades obtained. The range of current is the one that enables recruitment modulation (0–100%). These configurations reach the maximum recruitment i.e. 100% based on EMG recordings (fingers and thumb flexions only) and MRC scaling (all)

From: Selective neural electrical stimulation restores hand and forearm movements in individuals with complete tetraplegia

Median nerve
PatientWrist flexionFingers flexionThumb flexionThumb oppositionForearm pronation
P5MRC < 3
680 μA–1640 μA
TL(B1)
MRC < 3
800 μA–1640 μA
BP(AC)
MRC < 2
1440 μA–1920 μA
TT(B4)
MRC < 2
680 μA–1640 μA
TTR(B4)
Not Obtained
P6MRC < 4
400 μA–720 μA
TL(B1)
MRC < 4
400 μA–720 μA
TL(B1)
MRC < 4
480 μA–720 μA
TL(B1)
Not ObtainedMRC < 4
747 μA–1120 μA
TT(A1)
P7MRC < 4
40 μA–400 μA
Ring
MRC < 4
240 μA–400 μA
TL(B1)
MRC < 4
240 μA–400 μA
TL(B3)
MRC < 4
93 μA- 700 μA
TT(A1)
MRC < 4
40 μA–400 μA
TTR(B2)
P8MRC < 4
560 μA–933 μA
TT(A4)
MRC < 4
240 μA–400 μA
TLR(B2)
MRC < 4
240 μA–400 μA
STR(B2)
MRC < 3
240 μA–400 μA
TL(B3)
MRC < 4
240 μA–400 μA
TL(B4)