1542-Wake-Activated Neuron Regulating Sleep Drive

Paper Talk · Sep 5, 2026 · 22m

Researchers have identified specialized neuronal populations in the median raphe and the anterior medial preoptic area that act as key regulators of sleep drive in mice. By using whole-brain activity mapping and genetic manipulations, the study demonstrates that these cells become increasingly active during prolonged wakefulness to signal a growing need for rest. Chemogenetic activation of these neurons successfully induces deep sleep, while inhibiting them significantly reduces sleep and prevents the typical behavioral urge to sleep after deprivation. Remarkably, mice with chronic inhibition…