🕐 Circadian Rhythm

Wake time (h): 7 Sleep time (h): 23 Light intensity (lux): 1000 Chronotype offset (h): 0 Jet lag shift (h): 0

Clock phase—

Peak melatonin—

Peak cortisol—

Sleep window—

Social jet lag—

Goodwin Oscillator
Negative feedback loop: X→Y→Z→−X.
Period ≈ 24 h regulated by protein degradation rates and light-driven phase sensitivity (phase response curve, PRC).