Artificial sensorimotor synaptic system. (a) Schematic diagram of the visual perception motor system. (b) Spike number-dependent-plasticity (SNDP) measured on the s-ONWST. (c) Output voltage and displacement (δ) of the polymer actuator with different spike number under 100% strain. (d) Bending diagrams of polymer actuator under different spike number under 0% and 100% strain. Reprinted with permission from Ref. [109], Copyright 2018 AAAS.