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. 2005 Apr 22;89(1):120–129. doi: 10.1529/biophysj.104.058388

FIGURE 7.

FIGURE 7

Entrainment of the 10,000 coupled circadian cell system by a light-dark cycle (R = 0.53). The light-dark cycle is described by a square-wave forcing: L = 0 in dark phases and L = 0.01 in light phases. (A) Distribution of the individual periods. (B) Oscillations of X for 10 randomly chosen oscillators among a total of 10,000 oscillators. (C) Distribution of the periods in the coupled system. (D) Oscillation of the mean field, F. Parameter values are the same as in Fig. 1. Although the system displays a quasiperiodic behavior, the period and the phase of the oscillations are very well conserved. Only the amplitude undergoes very small variations. In B and D, the white and black bars indicate the light and dark phases, respectively.