The crises of panic in people with phobias triggered the alarm, the person begins to feel all the reactions physiological primitive flee or fight, and immediately come to mind catastrophic images. The limbic system reacts to this situation once more, which leads to one further increase in the levels of fear. Breathing is altered, causing changes in blood chemistry. Endocrine glands pumping hormones, such as adrenaline, into the blood. To be confronted with a phobic stimulus, people have an increase in your heart rate and your blood pressure. When this happens, the person perceives a confirmation that their initial symptoms were in fact indicators of serious hazard. A feeling of extreme danger invades the person, whereupon the limbic system returns to react triggering the response of fear, becoming a vicious circle that paralyzes the person. The frontal lobes are responsible for changing the attention aware of one thing to another, according to what circumstances require.
Ability to change the conscious of the frontal lobes attention at will It is severely diminished in anxiety disorders. The primitive system of fear, on the other hand, tends to draw attention to the object perceived as threatening. Forces the consciousness to focus on the object of fear. In the case of phobias, attention is set entirely on the object of the phobia, excluding everything else. It is for this reason that when a person with a phobia is facing the phobic stimulus, his reaction is a very intense fear, despite the fact that the circumstances do not really pose a threat to the person. She sees only what it sees as threatening and magnificent, excluding all the context that could help reduce the feeling of vulnerability and danger.