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Дата: 25.01.2018

стресс (1993)

Holmes and Rahe stress scale and Stress psychological A renewed interest in salivary alpha amylase as a marker for stress has surfaced. Yamaguchi M, Yoshida H 2005 have analyzed a newly introduced hand-held device called the Cocorometer developed by Nipro Corporation of Japan.

They state that this can be reliably used to analyze the amylase levels and is definitely a cheaper alternative as compared to the more expensive ELISA kits. The working consists of a meter and a saliva collecting chip, which can be inserted into the meter to give the readings. The levels of amylase obtained have been calibrated according to standard population, and can be categorized into four levels of severity. Some people are able to process many stressors simultaneously, while others can barely address a few.

Such tests as the Trier Social Stress Test attempted to isolate the effects of personalities on ability to handle stress in a laboratory environment.

Other psychologists, however, proposed measuring stress indirectly, through self-tests. Combining both helps researchers gauge how likely additional stressors will make him or her experience mental exhaustion. The intensity and duration of stress changes depending on the circumstances and emotional condition of the person suffering from it Arnold.

Some common categories and examples of stressors include: Social issues can also cause stress, such as struggles with conspecific or difficult individuals and social defeat , or relationship conflict, deception , or break ups , and major events such as birth and deaths , marriage , and divorce.

Life experiences such as poverty , unemployment , clinical depression , obsessive compulsive disorder , heavy drinking , [66] or insufficient sleep can also cause stress.

Students and workers may face performance pressure stress from exams and project deadlines. Adverse experiences during development e.

General adaptation syndrome[ edit ] A diagram of the General Adaptation Syndrome model. Physiologists define stress as how the body reacts to a stressor, real or imagined, a stimulus that causes stress. Acute stressors affect an organism in the short term; chronic stressors over the longer term. During this phase, the body can endure changes such as hypovolemia , hypoosmolarity , hyponatremia , hypochloremia , hypoglycemia —the stressor effect.

When the threat or stressor is identified or realized, the body starts to respond and is in a state of alarm. There is also some activation of the HPA axis , producing glucocorticoids cortisol , aka the S-hormone or stress-hormone.

Stage 2[ edit ] Resistance is the second stage and increased secretion of glucocorticoids play a major role, intensifying the systemic response—they have lipolytic, catabolic and antianabolic effects: Moreover, they cause lymphocytopenia, eosinopenia, neutrophilia and polycythemia. In high doses, cortisol begins to act as a mineralocorticoid aldosterone and brings the body to a state similar to hyperaldosteronism. If the stressor persists, it becomes necessary to attempt some means of coping with the stress.

Although the body begins to try to adapt to the strains or demands of the environment, the body cannot keep this up indefinitely, so its resources are gradually depleted. Stage 3[ edit ] The third stage could be either exhaustion or recovery: The high glucose, fat and amino acid levels in blood prove useful for anabolic reactions, restoration of homeostasis and regeneration of cells. Exhaustion is the alternative third stage in the GAS model. The initial autonomic nervous system symptoms may reappear sweating, raised heart rate, etc.

The result can manifest itself in obvious illnesses, such as general trouble with the digestive system e. He started to use the term to refer not just to the agent but to the state of the organism as it responded and adapted to the environment. His theories of a universal non-specific stress response attracted great interest and contention in academic physiology and he undertook extensive research programs and publication efforts.

During the 1950s, Selye turned away from the laboratory to promote his concept through popular books and lecture tours. He wrote for both non-academic physicians and, in an international bestseller entitled Stress of Life, for the general public. A broad biopsychosocial concept of stress and adaptation offered the promise of helping everyone achieve health and happiness by successfully responding to changing global challenges and the problems of modern civilization. Selye coined the term " eustress " for positive stress, by contrast to distress.

He argued that all people have a natural urge and need to work for their own benefit, a message that found favor with industrialists and governments. By the late 1970s, stress had become the medical area of greatest concern to the general population, and more basic research was called for to better address the issue. The US military became a key center of stress research, attempting to understand and reduce combat neurosis and psychiatric casualties.

The condition was added to the Diagnostic and Statistical Manual of Mental Disorders as posttraumatic stress disorder in 1980. The stressor may involve threat to life or viewing the actual death of someone else , serious physical injury, or threat to physical or psychological integrity. In some cases, it can also be from profound psychological and emotional trauma, apart from any actual physical harm or threat.

Often, however, the two are combined. By the 1990s, "stress" had become an integral part of modern scientific understanding in all areas of physiology and human functioning, and one of the great metaphors of Western life.

Focus grew on stress in certain settings, such as workplace stress , and stress management techniques were developed. The term also became a euphemism , a way of referring to problems and eliciting sympathy without being explicitly confessional, just "stressed out".

It came to cover a huge range of phenomena from mild irritation to the kind of severe problems that might result in a real breakdown of health. In popular usage, almost any event or situation between these extremes could be described as stressful.