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Lethargy It is a term that comes from Latin lethargus, in turn derived from the Greek lharthargos. The concept refers to a pathological state which is characterized by a dream extended and deep .

Certain diseases Toxic, infectious and nervous cause lethargy of those affected. There are, however, different ways of understanding what lethargy is.

In some cases, the notion is linked to a state from prolonged unconsciousness . The subject may be awakened, but soon falls asleep again.

Lethargy, on the other hand, can be related to drowsiness or the doze .

This meaning of lethargy is linked to some diseases; In fact, it can be one of the symptoms of various disorders that, in addition to a deep need for sleep, are characterized by drowsiness, awkwardness, slowness and alienation of mind.

One of the diseases in which lethargy occurs is the narcolepsy , which is also known as Gelineau syndrome. Its main feature is an excess of daytime sleepiness that is impossible to resist.

In addition to lethargy itself, narcolepsy can cause the following symptoms, with varying degrees of severity:

* cataplexy (considerable weakness or paralysis of a muscular joint on both sides of the body);

* hypnagogic hallucinations (visions passengers that take place between wakefulness and sleep states);

* hypnopompic hallucinations (the visions that take place in the transition from sleep to wakefulness);

* sleep paralysis (the momentary inability to perform physical movements voluntarily during transition between sleep and wakefulness);

* sleep interruption at night

Also called lethargy to repose that perform certain species of animals for varied periods of time. In lethargy, these specimens reduce their metabolic activities to a minimum, taking their respiratory rate and body temperature to lower levels than normal.

To survive during lethargy without feeding, animals resort to the reserves of Energy that were stored in his body in the previous months. While in the warm season they are dedicated to increasing these reserves, in the winter they use them.

In colloquial language, finally, lethargy is associated with lack of response , action or initiative . For example: "Can you get out of lethargy and help me solve this problem?", “When my son died I went into a lethargy for several years”, "The home team woke up from their lethargy and returned to victory after five games".

As we can see in these examples, the idea of ​​lethargy applied in a figurative sense can give rise to different interpretations. In the first sentence we understand that the issuer does not approve the lack of activity from your interlocutor, since he considers that he should be helping you solve your problem. In the second, however, the "emotional paralysis" comes after the death of a loved one, and this is not voluntary, but a state that invades us until threatening to drown.

Finally, there is talk of a football team whose luck did not accompany him until his situation suddenly reversed in a match. In this case, lethargy is understood as the inability to move forward, to continue climbing in a tournament or grow professionally; neither is it voluntary, but it may be due to lack of experience, problems of Health of the players or, why not ?, to matters more typical of chance.

All the meanings set forth in the previous paragraphs can be seen in the following list of synonyms: hibernation fainting, stunning, paralysis, numbness, coma, clumsiness, drowsiness and doze. Regarding its antonyms, we can highlight wakefulness and activity.

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