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A nerve is fiber set of a particular type that drives impulses between the central nervous system and different parts of the body. This group is shaped like a whitish cord and the ability to transmit electric waves (nerve impulses or action potentials) at high speed. Usually, the nerve impulse is born in the cell body of a neuron and passes from the axon to the end; through synapse, manages to transmit to another neuron.

There are different types of nerves: afferent they are those that carry sensory signals from the skin or other organs to the brain; the efferent instead, they move the impulse from the brain to the glands and muscles.

According to their origin, the nerves can be cranial (born in the bulb or brain), spinal (originated in the spinal cord) or sympathetic nervous system . According to its function, there are sensory nerves (transmit stimuli from the organs of the senses), motors or centrifuges (carry the movement orders to the muscles and glands), sensitive or centripede (lead external excitations to nerve centers) and mixed (They function as motor and sensitive).

On the other hand, the concept of nerves is usually related to the tension or emotional agitation who experiences a person . It can refer to very diverse situations, since on the one hand it denotes insecurity in oneself against certain pressures, and on the other it resembles reactions related to hysteria. Putting the term in context, we can give the following example sentences: "The nerves didn't let me sleep all night", "My nerves betrayed me and I couldn't speak", "Suddenly he got a nervous breakdown and started to break everything".

In the first two cases, it is noted that the person had to face something (or someone) that surpassed it; It can be a very difficult academic exam, a job interview, or also a very coveted love-type encounter. They are moments that generate a large volume of expectations who should go through them, and the result is a kind of overload emotional that prevents normal action against them.

The last sentence speaks of a very different situation: nerve attacks They may or may not have the same origin as the other cases, based on insecurity in the face of a challenge that intimidates the individual given their difficulty. However, regardless of its root, it is a way of channeling emotions opposed to blockage; it is a syndrome studied by psychology and that has as symptom common the shouting, he crying, the verbal and physical attacks, with the addition of showing a clear lack of control.

It is essential to underline this last part, because when an individual suffers a nervous breakdown he loses the control Of their acts; on the other hand, it is common for the witnesses of this disorder to think that it is free aggression, a lack of education or the desire to attract attention; and nothing could be further from the truth.

To plot a nervous breakdown, let's take the example of a young executive working in an office with dozens of people and leading a life. apparently calm and tidy, who studied hard to get his job and is considered a very intelligent person by his environment; one day, an argument with a partner leads him to take a chair and lash out at the furniture and computers, as if he had been spontaneously possessed by a demon. The question that should be asked by those who think it is a question act volunteer is why would this individual want to throw so much effort in the trash?

Finally, the nerves were a Belgian tribe which was north of the Gaul during the 1st century B.C. east of the river Scald .

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