How the Brain Controls Sleep Cycles
The brain regulates sleep through a system called the circadian rhythm, which acts like an internal clock responding to light and darkness. This rhythm is controlled by the hypothalamus, a part of the brain that signals when it's time to feel sleepy or alert. When it gets dark, your brain produces melatonin, a hormone that makes you feel drowsy. On the other hand, exposure to light especially blue light from screens can disrupt this rhythm and delay sleep. Understanding how this cycle works can help people build better habits to improve their sleep, such as maintaining a regular bedtime and limiting screen time before bed. Shutdown123