When strong affects (expressed in strong, sometimes excessive, intense and turbulent the external expressions of emotional experience.) the normal flow of associations is disturbed, the consciousness covered by only one view associated with this predominant emotion. All the rest disappear from view, and the emergence of new ideas that do not correspond to the predominant emotion, to be braked. At the beginning of the emotion of fear is "sinking", the body as it waits for more, and then emerged at the beginning of the presentation remain in the mind for a long time. The effect can manifest itself in violent action and in strong changes in circulation and respiration, it can sometimes cause you to faint, but rarely occurred cases instant death in connection with the experience of emotions. People with quite developed the braking process, despite the strong experience of the emotions, to correctly assess the surrounding situation, and control their actions. Such affective reactions, typical of a healthy person are called physiological affects. In every certain moment of time a person experiences only one predominant emotion.
With the emotion of fear linked to many hormones and neurotransmitters. They act on the body in the complex, causing a reaction of the body, vasoconstriction, increased muscle tension, the whole body slows down. The most important hormones produced when fear, adrenaline noradrenaline.
Women and men experience and overcome fear in different ways, it is connected with physiological peculiarities of their organisms. In particular with the work of the brain and different hormones that produce the female and the male organism, and peculiarities of sex education.
The first and main response to the onset of danger is the release by the adrenal cortex into the blood large amounts of adrenaline. For this reason, the adrenaline figuratively called the hormone of fear. After this internal "injection" in the body runs a series of complex processes whose aim is, ultimately, increase the maximum ability to survive in extreme situations. Under the action of adrenaline, the pressure increases and dilate the blood vessels of the brain. It improves the nutrition of the brain, sharpens the perception, accelerates information processing and facilitates the process of thinking. Adrenaline itself refers to the catabolic hormones and stimulates the production of another catabolic hormone, cortisol. This means that under its action there is an acceleration of metabolism and increased saturation of blood substances that facilitate physical and mental work.