Sleep Architecture & Circadian Cycle Simulator

15:00

Sleep Efficiency

91.5%

Target: >85% (Optimal)

Deep Sleep (N3)

105 min

21.9% of Total Sleep

REM Sleep

115 min

24.0% of Total Sleep

Process S Peak

0.88

High Sleep Drive

Awakenings

Normal Sleep Continuity

Process C Align

High Synchrony

Optimal Melatonin Phase

1. Schedule & Rhythm

Bedtime Target 23:00

Wake Time Target 07:00

Chronotype

2. Environmental & Biochemical Modifiers

Caffeine Dose 200 mg

Caffeine Intake Time 15:00

Evening Blue Light Exposure 5000 Lux

Bedroom Temperature 67 °F

* Adenosine half-life is modeled at 5.7 hours. High ambient temperature and blue light impair deep slow-wave generation and delay melatonin onset.

Understanding Sleep Architecture & Bio-Mechanics

Human sleep is governed by the interaction of two main forces: Process S (the homeostatic sleep drive powered by adenosine accumulation in the brain during wakefulness) and Process C (the circadian pacemaker in the suprachiasmatic nucleus driven by light and melatonin).

Process S (Homeostatic Drive) Adenosine builds up exponentially while awake, creating "sleep pressure." During sleep, adenosine is rapidly cleared, resetting sleep pressure for the next day. Caffeine acts as a competitive antagonist at adenosine A1/A2A receptors.

Process C (Circadian Oscillator) A sinusoidal 24-hour rhythm controlled by light input through retinal ganglion cells to the SCN. It promotes alertness during daytime and suppresses it at night when melatonin rises.

Hypnogram & Brainwave Dynamics Normal sleep cycles (~90 min) alternate between non-REM (N1, N2 with spindles/K-complexes, N3 Slow-Wave Deep Sleep) and REM sleep (rapid eye movement, muscle atonia, vivid dreaming, high-frequency low-voltage EEG).