Fig. 3.
A Publication trends for FES (n = 5), ES (n = 5), FNS (n = 5), TSCS (n = 3), and EES (n = 3) by year; and B reported study designs of each neuromodulation technique with number of articles published. Abbreviation: FES = functional electrical stimulation; ES = electrical stimulation; FNS = functional neuromuscular stimulation; TSCS = transcutaneous electrical spinal cord stimulation; EES = epidural spinal electrical stimulation; RCT = randomized controlled trial