Gamma-range activity is often discussed as part of how brain networks coordinate information. In Alzheimer’s disease, those networks can become disrupted early—years before symptoms become severe—so scientists have been curious: If we support timing and coordination of Gamma activity in the brain, could we end up influencing disease biology? What animal studies found (and why they got so much attention) The modern wave of 40-Hz Alzheimer’s research gained traction after a 201

Have you ever noticed how your body naturally syncs to a beat—tapping a foot to music, matching your pace to a walking partner, or getting drowsy during a steady train ride? That “syncing” tendency has a scientific name: entrainment . And researchers are now exploring whether the brain can be gently guided by rhythm too—especially at a frequency that keeps showing up in neuroscience: 40 hertz (40-Hz) . Why 40-Hz matters Forty hertz sits in the range of faster brain rhythms so