Umbra Sleep Lab Night record no. 213
Lights out23:12 Rise07:04

Tuesday → Wednesday · 12 Nov

Seven hours, fifty-two minutes,
and five trips through REM.

A stepped record of one night at 30-second resolution. Bands drop as sleep deepens; the teal lane marks paradoxical sleep, when the brain runs hot and the body goes quiet.

Stage trace · 23:12 – 07:04 · 472 min

Hover the trace — · —
Stage
Time in bed7h 52m23:12 → 07:04
Asleep7h 13m+22m vs. 30-night mean
Efficiency92%Top decile
REM2h 20m32% of sleep
Deep (N3)1h 44m24% of sleep
Light (N1+N2)3h 09m44% of sleep
Latency12mSlower than usual
Awake after onset27m3 awakenings

Cycle ledger

Each cycle is scored from sleep onset to the close of its REM window. Deep sleep front-loads; REM stretches as the night goes on.

5 cycles · 94 min mean

Marked events

Annotations logged by the band and by hand, aligned to the trace above.

23:24

Onset confirmed

Twelve minutes of settling — four above the personal baseline. Room held at 18.1 °C with the blind half-drawn.

01:16

Deepest slab of the night

Forty-four unbroken minutes of N3 inside cycle two. Heart rate bottomed at 48 bpm; no movement flags recorded.

05:41

Long paradoxical window

A thirty-four minute REM run, the longest of five. Respiration variability tripled — the signature of dense dreaming.

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