Utility type · phase disruption · compare metrics
Hypnic myoclonus (sleep start) · theta 4–7 Hz · N1
Hypnic myoclonus (sleep start), catching the transition into this stage maps onto [sudden limb twitch · falling sensation · brief heart-rate spike] inside theta 4–7 Hz, atonia "N/A" — scored as hardware, not metaphor.
Stage vs disruption comparison
| Signal | Stage baseline | This disruption row |
|---|---|---|
| Dominant band | theta | theta |
| Hz window | 4–7 Hz | 4–7 |
| Arousal pressure | low–moderate | 78 / 100 |
| Stage coherence | stable | 42 / 100 |
| Context | — | onset |
Somatic disruption markers → text
Dataset readout: Hypnic myoclonus (sleep start) in N1 (onset). Cortical window 4–7 Hz (theta). Atonia=N/A. Markers drive the text below — not dream-symbol meanings.
- sudden limb twitch
- falling sensation
- brief heart-rate spike
Transmitters in this row:
- norepinephrine
- glutamate
- GABA
Mechanism stack
- Hypnic myoclonus (sleep start), catching the transition into this stage sits inside N1 sleep, with cortical activity running theta at 4–7 Hz.
- The lead transmitter is norepinephrine (aminergic wake pressure returns toward cortex), alongside glutamate, GABA — this row's density score is 110.
- Dataset row #10002: atonia 15/100, arousal 78/100, coherence 42/100 — the brake is loose enough to slip, set against a noisy, broken backdrop.
- On this onset row the markers stack as "brief heart-rate spike" → "falling sensation" → "sudden limb twitch" — building as the stage gate closes.
- The BODY line on this page leans on "sudden limb twitch" for this onset/N1 row — read as mechanism, not dream-symbol shorthand.
"sudden limb twitch" logged at stage entry shifts how Lab Search ranks N1 sleep pages: body signal first, imagery second.
Felt on waking
On waking, the marker named most often is "sudden limb twitch" with "falling sensation" close behind. Because this row sits at onset in N1 sleep, it is easy to mistake for a stray thought rather than a body event.
Related physiology
This row connects to Cycle timing — how episodes lengthen and shift across the night.
How Lab Search uses this row
When your recall names "sudden limb twitch" — tied here to norepinephrine activity, Lab Search reads it as body-side evidence for the BODY line of the matching page rather than as a symbol. It adjusts the mechanism ranking for N1 sleep instead of guessing at what "sudden limb twitch" might "mean".
Which markers match waking recall?
Matches noted — open Lab Search with this somatic context.
Search with body context →Was this utility useful?
Saved on this device only.
How to read Hypnic myoclonus (sleep start) · theta 4–7 Hz · N1
This row is Hypnic myoclonus (sleep start) in N1 (onset). Cortical window 4–7 Hz (theta). Atonia state: N/A. Density 110. Chart seed 10002 is deterministic for this URL — the trace is a model of the row, not a clinical EEG.
Gauges on this page: atonia 15, arousal 78, coherence 42. Markers: sudden limb twitch, falling sensation, brief heart-rate spike. Transmitters tagged: norepinephrine, glutamate, GABA. Those fields are why two “similar” titles are not duplicates. If a marker did not happen to you, say so — do not wear the whole row.
What the body is doing — not what the image “means”
On waking, the marker named most often is "sudden limb twitch" with "falling sensation" close behind. Because this row sits at onset in N1 sleep, it is easy to mistake for a stray thought rather than a body event. "sudden limb twitch" logged at stage entry shifts how Lab Search ranks N1 sleep pages: body signal first, imagery second.
- Hypnic myoclonus (sleep start), catching the transition into this stage sits inside N1 sleep, with cortical activity running theta at 4–7 Hz.
- The lead transmitter is norepinephrine (aminergic wake pressure returns toward cortex), alongside glutamate, GABA — this row's density score is 110.
- Dataset row #10002: atonia 15/100, arousal 78/100, coherence 42/100 — the brake is loose enough to slip, set against a noisy, broken backdrop.
- On this onset row the markers stack as "brief heart-rate spike" → "falling sensation" → "sudden limb twitch" — building as the stage gate closes.
- The BODY line on this page leans on "sudden limb twitch" for this onset/N1 row — read as mechanism, not dream-symbol shorthand.
How Lab Search should use this row
When your recall names "sudden limb twitch" — tied here to norepinephrine activity, Lab Search reads it as body-side evidence for the BODY line of the matching page rather than as a symbol. It adjusts the mechanism ranking for N1 sleep instead of guessing at what "sudden limb twitch" might "mean". Then open Decode if you also have a plot. The plot is optional; the body line is not.
This utility will not treat Hypnic myoclonus (sleep start) as a spirit, a pregnancy test, or a death omen. It will treat it as a stage-bound somatic metric. If symptoms are nightly, worsening, or include dream enactment, that is clinical, not catalog.
Find the mechanism behind tonight’s signal
Not a symbol dictionary. Describe what you remember — images, body sensations, waking state — in Lab Search for the closest dream or somatic mechanism page.
Open Lab Search →Not a medical diagnosis. Dataset row for exploration only.