The Stress Reaction: A Historical Perspective.

The history of stress research - milestones and people. Definitions and modern concepts of stress as well as the conflict between Hans Selye and the psychologists are described in this review. The molecular and physiological mechanisms of stress and their possible pharmacological intervention are introduced. The cycle of stress is presented as a new concept of the stress reaction, trying to bridge the gap between physiology and psychology. The cycle is a circular event in life, composed of 4 phases: (1) the resting ground phase, (2) the tension phase, (3) the response phase, and (4) the relief phase. In each phase, both physiological and psychological components can be assessed. These components are the basis for the proper handling of each phase and provide a unified model for the psycho-biological response to stress. In addition, parameters of the cycle such as frequency, duration, and intensity can be measured, providing an effective tool for stress management. Finally, modern techniques and mechanisms for coping with stress are discussed like the Norwegian Gate Theory and Lazarus Dichotomy Model for the Stress Reaction. In the above models, specific examples of how people respond to the first time encounter of stressful events and how soldiers cope with stress are presented.