* Based on Weiner H. Perturbing the organism: the biology of stressful experience. Chicago: University of Chicago Press; 1992.
KEY CONCEPTS SUPPORTING AN UNDERSTANDING OF SURVIVORS:
• The organism is a dynamic, evolving system of information exchange and processing - A disaster stimuli.
• It exists in an ever-changing environment where information transfer occurs within and between the brain and the environment - Internal sensory processing of disaster impact.
• The interrelationship of subsystems consists of a large variety of communication signals transmitted in a regular or irregular rhythmic manner - Disorganization of usual patterns after disaster.
• The organism is an intricate communication system of information exchanged by means of signals coming from external and internal sources and affecting the rhythm of these communication signals (neurological, hormonal, endocrine) - The total biological shifts following disaster stimuli.
• Stressful experience perturbs these rhythms and affects function, at times disorganizing them - Chance of outside patterns stresses individuals.
• Function is a unifying and dynamic concept that focuses on an integrated approach of the organism in its world. The patterns of physiology and behavior are inextricable - Coordinated by outside disorganized, unfamiliar events of disaster.
• Any perturbation of one component of the organism will lead to a change in function, which forms the basis of stress response theory. - This supports the basic biological disturbance to understand post-disaster behavior.
• Specific integrated, coordinated, and appropriate responses to each stressful experience occur. At times, depending on individual characteristics, these responses may be inappropriate, excessive, or inadequate, in which case symptoms may occur which depend on predisposition and disaster characteristics - During the sequential phases post-disaster we can observe how functions change.
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