We say that a person is conscious when he realizes what is happening in your environment, in itself, and has full use of his senses and faculties.
Loss of consciousness refers to the inability of the individual has to perceive their environment and react to it. The alterations of consciousness may be mild such as fainting (brief fainting), moderate as in syncope (fainting of five to ten minutes), and in severe shock or collapse (ordered from the indefinite consciousness) and Finally the most severe, coma (lack of awareness for an indefinite period with loss of basic functions).
Causes
These are varied, ranging from simple situations such as emotional disturbances, sudden drop in blood pressure, tiredness or lack of food, to uncontrolled disease (diabetes, heart disease), traumatic accidents, poisonings, neurological diseases and infections, among others.
Events
They usually are very clear: the person is unconscious, there is widespread pallor, visual disturbances, dizziness and weakness. There may also be signs of trauma or fractures in the fall when loss of consciousness occur.
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