Science Robotics Supplementary Materials The PDF file includes: Legends for movies S1 and S2 Download PDF Other Supplementary Material for this manuscript includes the following: Movie S1 (.mp4 format). SHAP and CPRT of patient II. Movie S2 (.mp4 format). Accuracy test of patient III with six myosignals and surface electrodes compared with implanted electrodes. Files in this Data Supplement: Adobe PDF - aaw6306_SM.pdf