We've all been afraid ever, but everyone feels differently. To the same situation, some people are easily frightened and run off, and those who need high doses of "terror" to leave in fear. Although it is logical that, depending on the situation, not experienced in the same way: not the same tremble because a murderer is chasing you (really fear for your life) to leave "fired" before the image of a ghost. However, in similar situations, some people enjoy and others who live shake ... Why?
Well, like everything else in life, fear has its scientific explanation.
From a biological perspective the Fear is a survival mechanism and defense that arises to allow the individual to respond to dangerous situations (or just difficult, as a test or an interview), quickly and efficiently. In fact, thanks to the emotion the human race has managed to survive as a species.
The mechanism responsible for regulating the feeling of fear in the brain, particularly in the limbic system . This regulates the emotions of conservation of the species (as mentioned above, fear is part of that complex of emotions, because without it, for example, we would have crushed to death by dinosaurs), reviewing the information from the senses through amygdala, which is responsible to control fear by antidiuretic hormone (vasopressin ).
What happens is that when the amygdala feel that the organism is in danger, sends that information to the nervous system (the interaction between these two systems occurs very quickly) and hence, the entire organism so that almost immediately, there are physiological changes: increased blood pressure and blood glucose, the immune system (defense) stops, the blood flows into the large muscles, the heart pumps blood fast, dilated, enlarged eyes (to see better), hair encrispado (goosebumps), stomach throbbing ... so it is very easy to recognize a person who has fear (it feels in the face.) In addition to the physiological changes, reflexes monitoring, freezing and escape / flight are much more developed.
This is what normally happens (and all in milliseconds), the problem is when this becomes disease and panic attacks arise .
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| Limbic System | |
CURIOSITIES
was investigated on the removal of the amygdala. In animals is much easier and it does seem to eliminate the feeling of fear, but in humans is more difficult because of the fear mechanism interacts with the cerebral cortex and other parts of the limbic system, so their removal would cause serious damage the body. In addition, at most, what would happen without the amygdala would be a personality change to calm.
Fear of physical harm caused the same reaction to the fear of psychic pain.
Happy Night of Souls!
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