dimarts, 7 d’abril de 2009

fear


Fear is an emotional response to threats and danger. It is a basic survival mechanism occurring in response to a specific stimulus, such as pain or the threat of pain.

I am very fearful, I am afraid of many things: death, snakes, the funfair (adrenaline), the scary movies, dentists... There are many situations that make me feel scared and insecure.
Many people love fear, they like note that the stomach is squeezed and they have chills.

To give you more information about the fear I have searched the causes of in our body and what happens if we haven’t.

The mechanism that triggered the fear is, either in person or animal in the brain, specifically in the limbic system, which is responsible for regulating emotions, struggle, escape and avoidance of pain, and in general for all functions of the individual and conservation of the species. This system is constantly revised (even during sleep) all information is received through the senses, and does so through the structure called the amygdala, which controls basic emotions like fear or affection, and is responsible for locate the source of danger. When the amygdala was activated triggers feelings of fear.

It is noteworthy that ethanol inhibits the production of vasopressin.
The removal of the amygdala seems to remove the fear in animals, but no such thing happens in humans (at most, change their personality and become more calm), in which the mechanism of fear and aggressive behavior is more complex and interacting with the cerebral cortex and other parts of the limbic system.