A pendulum can be stopped by a single impulse of the right magnitude, delivered at the proper time; started again, its phase will have changed. A biological oscillation, although it is a vastly more complicated phenomenon, can likewise be arrested by a single stimulus of a definite strength delivered at the proper time. This remarkable fact emerges from experiments I have conducted on two biological clocks, in organisms in the plant and animal kingdoms. The most interesting potential applications are, of course, those that involve the internal clocks of Man.
Resetting biological clocks
Arthur T. Winfree; Resetting biological clocks. Physics Today 1 March 1975; 28 (3): 34–39. https://doi.org/10.1063/1.3068875
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