"Our paper addresses the question of whether simple artificial systems can compute closed loops similar to the feedback loops that allow our brains to control our bodies," says corresponding author and biomedical engineer Yoshikatsu Hayashi of the University of Reading. "The basic principle in both neurons and hydrogels is that ion migration and distributions can work as a memory function that can correlate with sensory-motor loops in the Pong world. In neurons, ions run within the cells; in the gel, they run outside."
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