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. 2025 Jun 2;22:125. doi: 10.1186/s12984-025-01658-0

Fig. 1.

Fig. 1

(a) The experimental setup including the stimulation of the ulnar/median nerve, the EMG signals from the finger flexors and the flexion forces of individual fingers. (b) The symmetric high-frequency carrier pulse cluster electrical stimulation train in the Sym mode. (c) The asymmetric random high-frequency carrier pulse cluster electrical stimulation train in the aSymR mode