Fig. 6
From: The bear circadian clock doesn’t ‘sleep’ during winter dormancy
Phase-Response (a) and Phase-Transition (b) plots for all captive bears exposed to light pulses (1–4 h) in two consecutive years. The phase-response plot illustrates the relationship between the timing of the light pulse and shift in activity observed for several days after the light pulse was applied. The phase-transition plot illustrates the relationship between the ‘old’ phase (when light was applied) versus the ‘new’ phase (following the light exposure)