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. 2017 Feb 3;39(3):487–497. doi: 10.3892/ijmm.2017.2874

Figure 1.

Figure 1

Schematic representation of the concepts of homeostasis and allostasis. The panel on the right clarifies the important developments that the allostasis concept has introduced moving from the concept of homeostasis. For further details, see text. FB, negative feedback. Σ indicates any set of processes integrating and processing the incoming input to provide the output.