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Hans, Austrian endocrinologist in Canada, 1907-1982. See: adaptation syndrome of Selye.
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According to Selye (1974) "stress is the non-specific response of the body to any demand for change".
Os estudos realizados por Selye (1959) apontaram alguns sintomas como dores de cabeca, dores musculares, insonia, taquicardia, alergias, mudanca de apetite, desanimo e fadiga.
Selye (1974) introduced a term eustress which can be explained as an event which follows something positive.
The alarm stage occurs when the body is presented with a stressful situation (Selye, 1956).
Nearly a century has passed since Hans Selye first introduced the word stress in 1936, and this brilliant idea about stress has helped an entirely new field to be forged and attracted thousands of researchers to work on the biological mechanism of stress.
Selye (1956) characterizes stress as physical, mental and psychological response to a specific condition.
Lucille writes that "No One Has Adrenal Fatigue, But They Might Have Something Else." While the physiologist, the late Hans Selye, PhD, may disagree with the opinion that the adrenal gland cannot and does not hypertrophy and atrophy under extreme stress, Lucille makes the case that we do manifest a variety of emotional and physical symptoms if the stressors are overwhelming.
Hans Selye es considerado el mayor investigador del estres e identifico las tres fases del estres (Figura 1).
The word "stress" was first mentioned in explaining elasticity in Hooke's Law of 1658, "the magnitude of an external force or stress, produces a proportional amount of deformation, or strain in malleable metal." Accordingly, and after years, in 1936, Hans Selye, defined stress as "the non-specific response of body to any demand for change." After many laboratory experiments that he did on animals, he noticed that animals who were subjected to different physical or emotional stimuli lead to developing diseases similar to the ones people face every day such as heart attacks and strokes.
Early stress researchers have defined stress as a general effort to respond to environmental demands (Selye, 1977).