What Is the Role of Orexin in Sleep?

Imagine your brain has a tiny helper that keeps you awake during the day, like a personal coach telling you to stay on task. That helper is orexin, it’s kind of like a wake-up call for your brain. When orexin levels drop at night, your brain says, 'Time to sleep!' But when something goes wrong with this helper, people can't fall asleep and may even experience strange dreams during the day. It's like having a coach who never takes a break, it helps you stay alert but also makes falling asleep hard.