40 Hz Light Flicker and Sleep Regulation
The study titled “40 Hz Light Flickering Promotes Sleep Through Cortical Adenosine Signaling” explored how light flickering at specific frequencies influences natural sleep patterns. Researchers observed that 40 Hz light exposure increased adenosine activity in the visual cortex and related brain regions, with effects lasting for several hours after stimulation.
In animal studies, rhythmic 40 Hz light was associated with longer and more stable sleep cycles. These effects were connected to signaling pathways involving adenosine and cortical neurons, suggesting that 40 Hz light may play a role in supporting normal sleep regulation through brain–body communication networks.