Somehow I did manage to access the article, and while I didn't quite understand exactly what they did, it does go beyond dumb amplification.
> Neurostimulation platform. Biomimetic EES requires the delivery of concurrent stimulation waveforms that are turned on and off with a precise timing4,8,12,21. Moreover, many activities necessitate adjustment of stimulation parameters in closed-loop via wireless links. To support these features, we upgraded the Activa RC implantable pulse generator (IPG) with wireless communication modules (Supplementary Fig. 1). This neurostimulation platform supported real-time updates of EES frequency, amplitude and timing from up to 10 stimulation waveforms8. The new paddle lead was interfaced with the Activa RC, which was implanted in the abdomen. We also developed a new software operating through touchscreen interfaces to enable the rapid configuration of activity-dependent stimulation programs (Fig. 4c). To simplify these configurations, wireless recordings of kinematics and muscle activity are displayed in real time, concomitantly to EES waveforms (Supplementary Fig. 1 and Supplementary Video 2).
Regarding Cerbral Palsy, it is... Cerebral, meaning that the peripheral part of the sensory and motor pathways should be intact. So what you would need to do is develop a controller interfacing with them both. That may not be trivial, but I do think it could be done by aplication of known tech and principles.
> Neurostimulation platform. Biomimetic EES requires the delivery of concurrent stimulation waveforms that are turned on and off with a precise timing4,8,12,21. Moreover, many activities necessitate adjustment of stimulation parameters in closed-loop via wireless links. To support these features, we upgraded the Activa RC implantable pulse generator (IPG) with wireless communication modules (Supplementary Fig. 1). This neurostimulation platform supported real-time updates of EES frequency, amplitude and timing from up to 10 stimulation waveforms8. The new paddle lead was interfaced with the Activa RC, which was implanted in the abdomen. We also developed a new software operating through touchscreen interfaces to enable the rapid configuration of activity-dependent stimulation programs (Fig. 4c). To simplify these configurations, wireless recordings of kinematics and muscle activity are displayed in real time, concomitantly to EES waveforms (Supplementary Fig. 1 and Supplementary Video 2).
Regarding Cerbral Palsy, it is... Cerebral, meaning that the peripheral part of the sensory and motor pathways should be intact. So what you would need to do is develop a controller interfacing with them both. That may not be trivial, but I do think it could be done by aplication of known tech and principles.