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International Journal of Photoenergy
Volume 2014 (2014), Article ID 832706, 11 pages
Review Article

Action-Dependent Photobiomodulation on Health, Suboptimal Health, and Disease

1Laboratory of Laser Sports Medicine, South China Normal University, University Town, Guangzhou 510006, China
2Department of Chemistry and Biology, College of Science, National University of Defense Technology, Changsha 410073, China
3MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China

Received 22 February 2014; Accepted 29 March 2014; Published 24 April 2014

Academic Editor: Quan-Guang Zhang

Copyright © 2014 Timon Cheng-Yi Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The global photobiomodulation (PBM) on an organism was studied in terms of function-specific homeostasis (FSH) and scale-free functional network in this paper. A function can be classified into a normal function in its FSH and a dysfunctional function far from its FSH. An FSH-specific stress (FSS) disrupting an FSH can also be classified into a successful stress in its FSS-specific homeostasis (FSSH) and a chronic stress far from its FSSH. The internal functions of an organism can be divided into essential, special nonessential, and general nonessential functions. Health may be defined as a state of an organism in which all the essential and special nonessential functions are normal or their stresses are successful. Suboptimal health may be defined as a state of a disease-free organism in which only some special nonessential functions are dysfunctional in comparison with its healthy state. Disease may be defined as a state of an organism which is not in both health and suboptimal health. The global PBM of health, suboptimal health, or disease suggested that the PBM may depend on the organism action.