Sleep & Rhythms
Insomnia types, sleep paralysis, sleep debt, REM patterns, circadian phenomena.
32 entries
All behaviors in Sleep & Rhythms
Advanced Sleep Phase
The early-bird chronotype — natural sleep onset around 8-9pm, natural wake around 4-5am. A biological rhythm, not a discipline; the friction comes from a delayed-society scheduled around the opposite peak.
Circadian Rhythm Disruption
The misalignment of the body's internal 24-hour clock with the environmental cues it evolved to follow — and the slow accumulation of residue across every system that depends on circadian timing.
Deep Sleep Loss
The specific deficit of N3 slow-wave sleep — the deepest, repair-bearing stage of the night — and the cascade of small, irreversible residues it leaves across body, brain, and mood.
Delayed Sleep Phase
The natural-night-owl chronotype that becomes pathological when biology and schedule pull in opposite directions — sleep onset at 1–2am, wake near noon, and a long residue of forced-alignment debt during every weekday in between.
Early Morning Awakening
Waking one to two hours before the desired wake time and being unable to return to sleep — a specific insomnia subtype that, when persistent, is a classic somatic marker of melancholic depression.
Fragmented Sleep
Sleep broken into multiple shorter periods rather than consolidated into a continuous arc — often via micro-awakenings the sleeper does not remember. Total time can look adequate while sleep architecture fails to complete, generating daytime symptoms equivalent to deprivation.
Hypnagogic States
The threshold consciousness between waking and sleep — fragmentary images, drifting sounds, hypnic jerks, micro-dreams — a brief window where waking control loosens but full dreaming has not yet begun. Attended to, it holds material the daytime mind cannot reach.
Hypnopompic States
The transitional consciousness during waking — the threshold window where dream-residue recedes and waking-cognition assembles, and where what you do in the first minutes determines whether the night's work is harvested or lost.
Insomnia
Persistent difficulty falling asleep, staying asleep, or waking too early — three or more nights a week for three or more months, with daytime cost. The Threat System stuck on, in the one place it most needs to stand down.
Jet Lag
The body's biological-clock dislocation after crossing time zones — every internal system still running on the old zone while the environment runs on the new. A predictable residue pattern that recovers on its own clock, not the traveller's.
Light Exposure Misalignment
The modern inversion of the evolutionary light pattern — dim mornings indoors, bright screens at night — which feeds the Meaning System's circadian-input system the wrong signals and accumulates residue regardless of sleep timing.
Lucid Dreaming
The state of conscious awareness during dreaming — knowing you are dreaming while still dreaming. A learnable extension of waking awareness into normally unconscious cognitive territory, with therapeutic and creative uses.
Night Terrors
A non-REM parasomnia in which the Threat System fires its full activation sequence during the transition out of deep slow-wave sleep — most often in childhood, almost always remembered by the household and not by the child.
Nightmare Disorder
A clinical pattern of repeated, vivid, frightening dreams that wake you in distress and degrade your sleep — the Threat System's emotional-processing system unable to integrate the material it keeps being handed, treatable with the right tools.
Pre-Sleep Cognitive Activation
The cognitive arousal that surfaces in the sleep-onset window — racing thoughts, problem-solving, planning, anxious rumination — when the day's external distractions fall away and the brain's default-mode network reasserts.
Recurring Nightmares
The specific pattern of a nightmare returning across months or years with the same scenario, characters, or theme — distinguished from random bad dreams by its persistence. A signal of unintegrated content the sleeping system is still trying, and failing, to process.
REM Behavior Disorder
A parasomnia in which the normal paralysis of REM sleep fails, and the sleeper acts out dreams — sometimes violently. Clinically important not only for the immediate injury risk but because it often precedes neurodegenerative disease by a decade or more.
REM Sleep Loss
The specific deficit in dream-rich Rapid Eye Movement sleep — the stage that processes yesterday's emotional content overnight — and what accumulates when it doesn't run.
Restless Sleep
The subjective experience of poor-quality sleep despite adequate duration — waking unrefreshed, aware of frequent position changes, with daytime residue the sleep itself was meant to clear.
Shift Work Disorder
The DSM-5 / ICSD-3 sleep disorder produced when a work schedule is structurally misaligned with the body's circadian rhythm — a long, distributed after-tail the body cannot clear because the schedule will not let it.
Sleep Anxiety
The anxiety specifically about sleep itself — dread of bedtime, worry about whether sleep will come, panic when it doesn't — that prevents the very state it pursues. A self-reinforcing loop in which the Threat System turns sleep into a performance domain.
Sleep Apnea Mood Effects
The depression, irritability, and cognitive flattening that accumulate when nightly airway collapse fragments the sleep the mood system depends on — a mood disorder wearing the costume of a primary mood disorder, and lifting when the breathing does.
Sleep Cycle Architecture
The structured nightly maintenance of every system — four to six cycles of roughly ninety minutes, each running through light sleep, deep slow-wave sleep, and REM, each stage doing work no other stage can substitute for.
Sleep Debt
The accumulating deficit from chronic insufficient sleep — a foundational residue that degrades every system the body runs, while adaptation to the impairment makes the cost subjectively invisible.
Sleep Inertia
The 15-to-60-minute window after waking when consciousness is present but cognitive capacity is not yet online — and the predictable poor outcomes that follow when important decisions are made inside it.
Sleep Maintenance Insomnia
The insomnia subtype where falling asleep is unproblematic but staying asleep is not — a 2am wake, a 30-to-90 minute battle to return, sometimes repeated. The Threat System breaching parasympathetic state mid-sleep, often driven by hormones, stress, or undiagnosed apnea.
Sleep Onset Insomnia
The specific insomnia subtype in which falling asleep — not staying asleep — is the problem. The Threat System holds the body in arousal across the very window the sleep system requires for descent.
Sleep Paralysis
The temporary inability to move or speak during the transition into or out of sleep, often accompanied by vivid hallucinations and terror — REM atonia persisting into wakefulness while the Threat System fires a full-system alarm.
Sleep Performance Anxiety
The specific anxiety that arises when sleep itself becomes a domain to perform — tracked, optimised, and graded against an external metric — and the parasympathetic surrender required for sleep becomes harder to access the harder it is pursued.
Sleep Procrastination
The pattern of delaying bedtime against your own intention — one more episode, one more scroll, one more low-value task — knowingly trading tomorrow's function for tonight's small unclaimed hour.
Social Jet Lag
The chronic misalignment between the sleep schedule the work week imposes and the schedule the body would choose — a weekly bi-directional time-zone shift without travel, and one of the quietest residue-accumulators in modern adult life.
The 3am Awakening Spiral
The specific pattern of waking between 2 and 4am unable to return to sleep, with anxious or existential content flooding a mind whose normal cognitive buffer is offline — the Threat System operating in a reduced-defence window.