Linked from

The 38 pages that link to Sleep, each with the reason it gives.

• DepressionRelated: Depression commonly changes sleep duration, timing, or quality.

• Type 2 diabetesRelated: Short or disrupted sleep is associated with impaired glucose regulation and higher risk.

• InsomniaNarrower topic: Insomnia describes difficulty obtaining this essential state, rather than a lack of desire for it.

• LonelinessRelated: Loneliness has been associated with poorer sleep quality and greater nighttime vigilance.

• TorporCompared with: Sleep reduces responsiveness, but torpor entails a stronger physiological suppression of metabolism.

• GABARelated: GABA-releasing neurons help promote sleep by inhibiting wake-promoting brain systems.

• Stress responseRelated: Stress can disrupt sleep, while insufficient sleep can intensify stress reactivity.

• DreamNarrower topic: Dreams are experiences generated within this changing state.

• HypnosisCompared with: Despite its name and appearance, hypnosis is not a form of sleep.

• Sleep hygieneNarrower topic: Sleep hygiene aims to support this recurring biological state.

• Mental healthRelated: Sleep disruption can affect mood, concentration, and stress tolerance.

• RuminationRelated: Rumination at bedtime can delay sleep and intensify distress.

• Midnight sunRelated: Blackout curtains and routines help preserve sleep when daylight continues through the night.

• ArousalCompared with: Sleep generally lowers arousal, though its stages differ in activation and responsiveness.

• StressRelated: Stress can disrupt sleep, while poor sleep can make demands harder to manage.

• Work–life balanceRelated: Work schedules and after-hours demands can restrict sleep and recovery.

• Daylight saving timeRelated: Clock changes can disrupt sleep schedules, especially during the spring transition.

• Sleep-wake cycleNarrower topic: It is one of the two broad states whose alternation defines the cycle.

• ChronotypeNarrower topic: Chronotype concerns sleep timing, not sleep itself or the amount required.

• Sleep medicineNarrower topic: Disorders are defined by disruptions to sleep’s timing, quality, duration, or associated functions.

• Intermittent fastingRelated: Late eating windows may interact with sleep timing and quality.

• Rapid eye movement sleepNarrower topic: REM is one stage within the broader sleep state.

• Heart rate variabilityRelated: Overnight HRV measurements can show changes associated with sleep stage and physiological strain.

• Sedentary behaviorCompared with: Lying still during sleep does not meet the waking-behavior definition.

• Energy drinkRelated: Late-day caffeine from energy drinks can delay sleep and reduce its duration.

• LibidoRelated: Poor or insufficient sleep can alter hormones, mood, and energy related to libido.

• NightRelated: Night is the customary sleep period for many people, though biology and schedules vary.

• WakefulnessCompared with: Sleep is the principal physiological state contrasted with wakefulness.

• Hot flashNarrower topic: Nighttime episodes can fragment sleep and compound daytime fatigue.

• Sleep disorderNarrower topic: Normal sleep provides the baseline against which a disorder is identified.

• Glass frogRelated: Some glass frogs hide much of their red blood cells in the liver while resting.

• Energy (everyday usage)Related: Sleep strongly affects alertness and perceived capacity for effort.

• Workweek and weekendRelated: Weekend sleep patterns often differ from weekday schedules.

• BradymetabolismCompared with: Ordinary sleep changes energy use but is not equivalent to pathological bradymetabolism.

• General anaestheticCompared with: Anaesthetic unconsciousness resembles sleep but is pharmacologically produced and physiologically distinct.

• HypnophobiaNarrower topic: The feared state in hypnophobia is sleep itself or the transition into it.

• SomnologyNarrower topic: It is the central biological phenomenon somnology investigates.

• SomnophiliaNarrower topic: Somnophilia centers on a person in this ordinary, naturally occurring state.