N2 indexed somatic utilities

Why N2 gets its own hub

N2 is the sigma window (11–16 Hz): spindles, K-complex, bruxism, periodic limb movements, pre-REM atonia ramp. The readout is muscle and EEG — not a symbol dictionary. This hub is not a blog about “N2 dreams.” It is the index of 12 high-density metric utilities currently allowed to crawl. Each card is a different symptom × N2 × context triple. Same phase, different hardware. Mixing N1/N2/N3/REM into one omen paragraph is how thin pages get born; this URL refuses that mix.

Contexts present in the live N2 index: onset, fragmentation, awakening, mid-cycle. Symptom families: Pre-REM atonia ramp, Periodic limb movements in sleep, Sleep-related bruxism (jaw clenching), Alpha intrusion into NREM, Sleep-related bruxism. If two links look similar, read the context suffix — onset is not awakening; fragmentation is not mid-cycle. Cortical language for this stage stays inside N2 physiology, not a personality metaphor.

Row-level facts currently indexed for N2

Open a utility when you woke with a body fact that matches the title, not when you merely searched the phase name. Full N2 batch (12):

Pre-REM atonia ramp in N2 sleep (onset) — Pre-REM atonia ramp · N2/onset · 6–14 Hz mixed. Atonia partial_failure. Markers: progressive limb heaviness, face slackening, eye movement precursors. Density 127.4.

Periodic limb movements in sleep in N2 sleep (fragmentation) — Periodic limb movements in sleep · N2/fragmentation · 8–14 Hz mixed. Atonia N/A. Markers: rhythmic leg kicks, ankle dorsiflexion, micro-arousal after kick. Density 112.6.

N2/fragmentation: Pre-REM atonia ramp — Pre-REM atonia ramp · N2/fragmentation · 10.98–17.72 Hz mixed. Atonia partial_failure. Markers: eye movement precursors, face slackening, micro-arousal body hitch. Density 110.6.

Pre-REM atonia ramp in N2 sleep (awakening) — Pre-REM atonia ramp · N2/awakening · 11.45–16.27 Hz sigma. Atonia partial_failure. Markers: brief autonomic flicker, exit-bound motor reboot, eye movement precursors. Density 110.5.

Pre-REM atonia ramp in N2 sleep (mid-cycle) — Pre-REM atonia ramp · N2/mid-cycle · 10.66–16.46 Hz sigma. Atonia partial_failure. Markers: eye movement precursors, face slackening, progressive limb heaviness. Density 109.8.

Sleep-related bruxism (jaw clenching) in N2 sleep (mid-cycle) — Sleep-related bruxism (jaw clenching) · N2/mid-cycle · 11–16 Hz sigma. Atonia N/A. Markers: jaw tension, tooth grinding, temporalis tightness. Density 109.

Alpha intrusion into NREM · sigma 11.26–16.38 Hz · N2 — Alpha intrusion into NREM · N2/awakening · 11.26–16.38 Hz sigma. Atonia N/A. Markers: brief autonomic flicker, exit-bound motor reboot, light sleep feel, muscle tension pockets. Density 107.2.

N2/awakening: Sleep-related bruxism — Sleep-related bruxism · N2/awakening · 11.09–16.49 Hz sigma. Atonia N/A. Markers: exit-bound motor reboot, jaw tension, temporalis tightness, tooth grinding. Density 106.8.

Alpha intrusion into NREM · alpha 8–12 Hz · N2 — Alpha intrusion into NREM · N2/fragmentation · 8–12 Hz alpha. Atonia N/A. Markers: unrefreshing stillness, muscle tension pockets, light sleep feel. Density 104.

Alpha intrusion into NREM · sigma 11.15–15.81 Hz · N2 — Alpha intrusion into NREM · N2/onset · 11.15–15.81 Hz sigma. Atonia N/A. Markers: brief autonomic flicker, light sleep feel, muscle tension pockets, transition tone shift. Density 102.4.

N2/awakening: Periodic limb movements in sleep — Periodic limb movements in sleep · N2/awakening · 11.3–16.65 Hz sigma. Atonia N/A. Markers: ankle dorsiflexion, exit-bound motor reboot, micro-arousal after kick. Density 102.

Sleep-related bruxism · mixed 10.91–18.61 Hz · N2 — Sleep-related bruxism · N2/fragmentation · 10.91–18.61 Hz mixed. Atonia N/A. Markers: jaw tension, micro-arousal body hitch, temporalis tightness. Density 101.8.

How to work a night that belongs on this hub: 1) write the first twenty seconds of residue (heat, weight, mute, twitch, jaw, breath). 2) pick the N2 card whose title names that residue. 3) read that row’s gauges and markers — numbers are URL-specific. 4) carry the row into Lab Search; do not paste a symbol. 5) if the night was mostly plot, use Dream Meaning; if it was mostly body, stay in /somatic.

N2 is a sleep-architecture label, not a type of person. N1 is a theta gate into sleep, N2 a sigma/spindle window, N3 a delta well, REM a dreaming state with spinal atonia. This page only lists N2. Neighbor hubs: N1, N2, N3, REM.

What this hub will not do: diagnose apnea, REM sleep behavior disorder, or psychiatric disease. Persistent dream enactment, choking, or daytime collapse needs a clinician. What it will do: keep N2 metrics honest so Decode is not guessing from a plot summary. Methodology lives on About; Lab Notes by Vigen sit at /notes.