Primary and secondary prevention

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Naturally, the first question that may occur to the reader in this regard, concerns what is health, as the disease develops? The answer to this question is very complex and still not fully exhausted.
On the basis of modern scientific concepts can come to the conclusion that health is a state of the body in which the functions of all organs and systems are balanced with the external environment. The concept of "health"as the term "norm", correlated to each human body includes the evaluation of different clinical, biochemical, physiological, and other indicators.
The analysis of these indicators, the conclusion is that health is a human condition that allows it optimally, without any restrictions to engage in labor and social activities. In this regard, it becomes clear deep sense that invested K. Marx in the concept of "disease", defining it as constrained in their freedom life.
If you understand health in a broad sense, as a condition for a full life, the most important factor of its formation is directly dependent on development of physical and spiritual abilities of the person, in whatever field he worked and in any geographical area it were.
Since there are different interpretations of the term "health", by the decision of the world Health Organization (who) made use of all countries of the world, unified view about this concept: "Health is a state of complete physical, mental and social wellbeing and not merely the absence of disease or infirmity".
However, health can be defined as the condition of the body, in which all the manifestations of his life are in harmonic and dynamic interaction with the environment. It should be borne in mind that, although a state of complete health exclude the presence of any expressed painful changes, each of these States - health and disease can be connected near passing stages of their development. These stages were likely under the influence of adverse environmental effects and signal about the development of the disease.
Thus, the disease occurs, as it was repeatedly said I. P. Pavlov, a breach of the relationship between the external and internal environment of the body. The most common symptom of the disease is to reduce the level of vital body functions and, mainly, the person's ability to work, i.e. violation of socially-useful for the society of human activity.
However, how these disorders and what measures must be applied in each case to prevent the disease and its progression, the issues are very complex and require clarification.
The founders of Russian physiological and clinical schools, I. M. Sechenov, I. P. Pavlov and S. P. Botkin has convincingly shown that a significant role in the development of the disease plays nervous system and, first of all, it is the brain. It is proved that negative emotional impact on the human cause of the disease or exacerbation of existing and hidden flowing disease. These facts are undeniable, and do not cause any doubts. It is not always clear mechanism of development of a disease. But the fact that both negative and positive emotions always cause significant changes in the functional state of the body, can make sure everyone. So catch phrase that "the word heals and the word cripples"has its scientific Foundation.
We know very well that after an unpleasant conversation, especially in Mature man who has some hidden flowing changes in the heart or blood vessels, often an attack of angina pectoris or hypertonic kriz, exacerbation of ulcer disease or dyskinesia biliary system.
It would, however, a mistake to think that the disease development plays a role only one nervous system. There are dozens and hundreds of reasons and the same mechanisms of development of many diseases. These mechanisms are determined known and unknown links, playing a major role in the understanding of the pathogenesis of these diseases.
During the last 10-15 years there appeared convincing evidence that stress and other negative factors cause changes not only and not so much in one nervous, but in other adaptive (adaptive) systems of the body.