FIGURE 2.

Ten-day ambulatory recording of (A) time in movement (light green) and motor activity (dark green), (B) wrist temperature (red) and subjective sleepiness (Karolinska Sleepiness Scale, KSS) (blue), (C) sleep probability (black) and light exposure (orange). Gray areas indicate Stage 2 (constant dim light). Previous and subsequent days correspond to Stage 1 (self-selected light/dark cycle) and Stage 3 (light/dark cycle with early wake up), respectively. Black bulb indicates darkness, yellow bulb indicates bright light (Stage 1, self-selected light/dark cycle), gray bulb indicates dim light (Stage 2) and alarm clock indicates light/dark cycle with early wake up (Stage 3).