The paper presents a brief review on how some concepts on the organism general adaptational reactions developed, including their role in increasing the unspecific resistance in the organism. Demonstrated is periodicity of the patterns of anti-stressor type reactions (training, calm and elevated activation) and stress in a wide range of stimulation values. The concepts on the organism adaptational reactions and reactivity levels have created the theoretical basis for practical applications of the activation therapy aimed at health improvement, prevention and treatment of various diseases, including oncology. Evidence data on the applications of the activation therapy as a promising approach to the organism state control are confirmed by the originators of this scientific discovery, their followers and medical experts.

The paper reveals logical relationships between events, facts and results of research studies and exemplary materials of practical applications of the adaptational reactions. It is demonstrated that the stress reaction by H. Selye and the anti-stressor type adaptational reactions by Lyubov Kh. Garkavi, Elena B. Kvakina and Maria A. Ukolova have become the cornerstone in development of scientifically grounded approaches to control of the organism states.

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The severity of pain and changes in the adaptational status were studied in patients with brain metastases or cervical cancer receiving xenon therapy after whole brain radiotherapy or after radical hysterectomy. Hematological indicators of the nature and tensiton of general nonspecific adaptional reactions of the body (ARs) by Garkavi-Kvakina-Ukolova, the QLQ-C15 questionnaire and a 10-point graphic visual analogue scale for the assessment of the intensity of pain were used. Xenon caused concurrent reduce in the intensity of pain and improvement of characteristics of ARs in all studied patients. The results suggested an association between the analgesic effect of xenon and the normalization of neuroimmune processes and reduced damaging effects of special antitumor treatment on the body under the influence of xenon.

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