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. Author manuscript; available in PMC: 2016 Feb 22.
Published in final edited form as: Front Neuroendocrinol. 2012 May 23;33(3):211–229. doi: 10.1016/j.yfrne.2012.04.003

Figure 3. An Illustration of Commonly-Used Circadian Terminology.

Figure 3

Depicted on top is a simple sinusoidal model of a subject’s behavioral or physiological rhythm (e.g., daily activity), and depicted below is the environmental cycle to which the subject was exposed (e.g., a light-dark cycle).