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(A stressor is a chemical or biological agent, environmental condition, external stimulus or an event seen as causing stress to an organism.) Selye initially (c. 1940s) called this the "general adaptation syndrome" (at the time it was also called "Selye's syndrome"), but he later rebaptized it with the simpler term "stress response".
Eustress is the positive cognitive response to stress that is healthy, or gives one a feeling of fulfilment or other positive feelings. Hans Selye created the term as a subgroup of stress [3] to differentiate the wide variety of stressors and manifestations of stress. Eustress is not defined by the stress or type, but rather how one perceives ...
Stress (biology) Schematic overview of the classes of stresses in plants. Neurohormonal response to stress. Stress, whether physiological, biological or psychological, is an organism's response to a stressor such as an environmental condition. [1] When stressed by stimuli that alter an organism's environment, multiple systems respond across the ...
To measure the body's response to stress, psychologists tend to use Hans Selye's general adaptation syndrome. This biological model, often referred to as the "classic stress response", revolves around the concept of homeostasis. General adaptive syndrome, according to this system, occurs in three stages: The alarm reaction. This stage occurs ...
Selye describes three stages of adaptation, including an initial brief alarm reaction, followed by a prolonged period of resistance, and a terminal stage of exhaustion and death. This foundational work led to a rich line of research on the biological functioning of glucocorticoids .
Walter Cannon and Hans Selye used animal studies to establish the earliest scientific basis for the study of stress. They measured the physiological responses of animals to external pressures, such as heat and cold, prolonged restraint, and surgical procedures then extrapolated from these studies to human beings.
John Wayne Mason, M.D. (February 9, 1924 – March 4, 2014) was an American physiologist [1] and researcher who specialized in the interplay between human emotions and the endocrine system. [2] Mason is regarded as an international leader and theoretician in the field of stress research, [3] where he was one of the field's most prominent voices ...
Chronic stress is the physiological or psychological response induced by a long-term internal or external stressor. [1] The stressor, either physically present or recollected, will produce the same effect and trigger a chronic stress response. [1] There is a wide range of chronic stressors, but most entail relatively prolonged problems ...