The brain's cerebrospinal fluid (CSF) pulses during deep sleep and this appears to be tied to brain wave activity and blood flow, an exploratory study showed. Large oscillations of CSF inflow to the ...

Sleep is profoundly restorative for the brain, partly because it clears solutes and waste products. This flushing works best during the deepest periods of sleep, but why is that? Data from the lab of ...

Yawning has long been dismissed as a sign of boredom or fatigue, a social cue we mostly try to suppress in meetings and on video calls. New brain imaging work suggests that instinct is misplaced. When ...