Fig. 3
From: Numerical study of entrainment of the human circadian system and recovery by light treatment
a Average shift Δ of the CBT minimum, obtained via simulations with T d =11 h, in the ν mo - I d parameter space. b Period-locking zone boundaries for two different values of T d . Points are marked for normal (circle), seasonal disorder (square), and non-seasonal disorder (triangle). The arrows indicate shifts from the normal state to the disordered states (see the text). Note that in simulations the leftward arrow (shift to seasonal disorder) is accompanied by a change in T d from 11 h to 9 h. The area enclosed in the the dotted box is enlarged in the inset