Abstract: After more than 30 years of applications of low-energylaser, many hypotheses remain about the mechanismsunderlying its biologic and therapeutic effects. Themajority of hypotheses are based on bioeffects as afunction of the photoinduction of biochemicalprocesses. This approach is problematic, however,because it is difficult to single out biochemicalprocesses that could not be altered by laser action. Analternative view to understanding the bioactivity oflaser exposure is that such activity, either by cells,tissue, organ systems, or the whole organism, is anadaptive response to stress. This paper summarizesbriefly three experiments conducted in our clinicutilizing low-level laser, and describes in some detailan experiment comparing the action of laser with aknown nonspecific, chemical adaptogen. !13
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