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Table 2 Summary of the outcome measures and stimulation parameters for active research participants. Caption: An overview of the implant date, outcome measures, and stimulation pulse amplitude used for the subjects focused on in this study. The stimulation frequency was 12.5 Hz for Subject 01, 20–100 Hz Subject 11, and 20 Hz for the remaining participants. Pulse width was varied between 1 and 255 μs

From: “Long-term stability of stimulating spiral nerve cuff electrodes on human peripheral nerves”

Subject Implant Date Outcome Measures Pulse Amplitude
S01 11/8/2005 8 charge threshold sessions from one month to 10.4 years post-implantation. 0.8 mA in 58% of the trials;
1.4 mA in 24% of the trials;
2.1 mA in 18% of the trials
S07 8/30/2010 10 charge threshold sessions from one month to 5.8 years post-implantation; measured moments to analyze muscle selectivity at 6.3 years post-implantation 1.4 mA
S08 5/2/2011 11 charge threshold sessions from one month to 5.3 years post-implantation; measured moments to analyze muscle selectivity at 4.2 years post-implantation 0.8 mA
S09 1/16/2012 6 recruitment curves at 4.5 years post-implantation Left femoral: 2.1 mA
Right femoral: 18 mA
Left tibial: 2.1 mA
Right tibial: 1.4 mA
Left fibular: 1.4 mA
Right fibular: 20 mA
S10 5/15/2012 6 recruitment curves at 4.5 years post-implantation Left femoral: 1.4 mA
Right femoral: 0.8 mA
Right tibial: 2.1 mA
Right fibular: 2.1 mA
Left tibial: 1.4 mA
Left fibular: 2.1 mA
S11 5/24/2012 13 charge threshold sessions from three weeks to 4.6 years post-implantation. Radial contact #1: 0.5–0.7 mA
Radial contact #2: 0.4–0.7 mA
Radial contact #3: 0.3–0.6 mA
Radial contact #4: 0.3–0.5 mA
S13 11/20/2014 2 recruitment curves at 2 years post-implantation 1.5 mA
S14 12/2/2014 2 recruitment curves at 2 years post-implantation Left femoral: 7 mA
Right femoral: 8 mA