Fig. 3

Experimental timeline. “Nerve health testing,” including NCS and needle EMG, was performed at 1 time-point preoperatively and 7 time-points postoperatively. “Functional testing,” including charge threshold and moment measurements, was performed intraoperatively without moment measurements and at 7 time-points postoperatively. Moment was collected at all postoperative time-points but was restricted to twitch moments only until the third week postoperatively. The percutaneous phase ended when a 16-channel IPG, full standing neuroprosthesis system was implanted. This required a reduction in the number of contacts for knee extension from 16 to 6 across both C-FINEs to allow stimulus channels to be assigned to intramuscular electrodes for hip and trunk extension