Imagine a future where a pill can switch brain networks on like light switches. Researchers discovered astrocytes—glial cells overlooked in neuroscience—form dynamic ensembles in the nucleus accumbens during reward learning. By genetically controlling these astrocytes in mice, they linked LED cues to sugar rewards and showed artificial stimulation boosted motivation. This reveals astrocytes’ active role in reward circuits, opening paths for neurotech to enhance motivation, le