Mixed

Core circadian clock genes (specifically Cry1, Cry2, Bmal1, Npas2, and Per1/Per2) regulate sleep homeostasis by modulating the buildup and dissipation of sleep pressure, as evidenced by altered EEG delta power and sleep duration in knockout models.

Your body's internal clock genes (like PER and CRY) don't just tell time; they track how long you've been awake. This tracking mechanism directly influences sleep pressure (measured by EEG delta power). To optimize sleep homeostasis, maintain consistent sleep-wake times to align with these molecular rhythms, as disruptions can alter how quickly sleep pressure builds up and dissipates.