Sleep terms.
Protocol Glossary.
Science-backed definitions for every term in your health data: plain English and the mechanism behind it.
36 terms in Sleep
C
4 terms
- CBT-I (Cognitive Behavioral Therapy for Insomnia)The evidence-based cure for chronic insomnia
- ChronotypeYour biological preference for when to sleep and be alert
- Circadian PhaseWhere you are in your 24-hour biological clock right now
- Circadian RhythmYour body's internal 24-hour clock: the master scheduler of nearly every biological function
S
19 terms
- Second Wind (Evening Alertness Peak)The late-evening burst of alertness that shows up right when you expect to feel sleepy
- Sleep and AgingWhy sleep gets lighter, shorter, and more fragmented as you get older, and what still stays in your control
- Sleep and TestosteroneMost of a day's testosterone is made overnight, timed to sleep stage rather than the clock.
- Sleep ArchitectureThe internal structure of your sleep, not just how long, but how deep
- Sleep DebtThe accumulated deficit between the sleep you need and the sleep you get
- Sleep EfficiencyThe percentage of your time in bed actually spent asleep
- Sleep FragmentationRepeated brief awakenings that break sleep continuity without always waking you fully
- Sleep HygieneThe daily habits that let your biology fall and stay asleep
- Sleep InertiaThe grogginess and cognitive impairment that follows waking from deep sleep
- Sleep LatencyHow long it takes to fall asleep after getting into bed
- Sleep Pressure (Homeostatic Sleep Drive)The biological urge to sleep that builds every hour you are awake
- Sleep Regularity Index (SRI)How consistent your sleep timing is: the dimension duration misses
- Sleep Restriction TherapyThe counterintuitive insomnia treatment that works by reducing time in bed
- Sleep SpindlesThe brain's memory consolidation signal during N2 sleep.
- Sleep StagingHow scientists classify the layers of a night
- Sleep WindowThe hours when your biology is aligned for sleep
- Slow-Wave Sleep (Deep Sleep)The deepest sleep stage, where your body actually rebuilds
- Social JetlagThe circadian disruption of sleeping on a different schedule every week
- Suprachiasmatic Nucleus (SCN)The master clock that synchronizes every biological rhythm
More terms added regularly. Check back for new entries across all categories.
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