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What is the function to mourn? Emotional tears have a different composition than the tears that lubricate the eye
Although we know the physiological mechanisms involved in the secretion of tears and, to some extent, the psychological factors that predispose to cry, to mourn the act remains largely a mystery.
Even the crying can occur for opposite reasons, as well picked William Blakeen The Marriage of Heaven and Hell: "Excess of sorrow laughs. Too much of that cry. "
As if this were not enough mystery, the act of mourn is emotionally universal, occurs in all cultures. For example, during the funeral rites mourn the members of all societies, except in Bali (and even there). Babies also cry when they feel hunger or pain. And it is estimated that women cry more than men (and babies more than women).
Furthermore, mourn is a uniquely human trait. Darwin said when I said that crying is one of the "specific expressions of man."
To our knowledge, no other species produces emotional tears, except, perhaps, the elephants, which advocates have tears. The evidence on the tears of elephants, however, are insufficient, as psychology professor says Tom Lutz of the University of Iowa in his book Crying:
Some people claim to have seen mourn their pets and other animals: dogs, seals, beavers and dolphins, but none of these claims have been proven. Even Jeffrey Moussaieff Masson and Susan McCarthy, author of When Elephants cry, set out to establish the nature of emotion in animals, but, after narrating in detail and great pathos history whiny little elephant, had to admit that most likely Elephants do not cry.
It may seem trivial to differentiate no emotional tears to emotional tears, but it is not at all. Physiologists have discovered that the chemical contents of emotional tears is different from basal or continuous tears, whose function is to lubricate the eyes. Because proteins have more excitement and more stress hormones relaciondas with.
From here, what we know about the tears is rather short, as Tom Lutz warns:
Anthropology, history, physiology, neurology, every discipline makes its own questions and come to their own answers. (...) Although this cultural record is extensive, every day comes a lot of questions: Why do we cry? What do they have in common with tears of joy, tears of grief, frustration or defeat? (...) When is neurotic or pathological crying? When is the inability to mourn pathology? Express what, exactly, the tears?
What seems certain is that mourn has a social function, such as laughter, the tears serve to demonstrate to those around us that our worth is reliable and not a Machiavellian ploy to raise the comfort or support. (While it is possible to fake cry, it is much more difficult to fake need help).
But sometimes tears come for reasons that have nothing to do with the social or assistance. Because it carries with it the emotions are complex and contradictory.
If tears replace verbal expression, no wonder it is so difficult to articulate its meaning, and this is further complicated by the wide variety of types and causes of crying.
Oren Hasson, an evolutionary biologist at the University of Tel Aviv, has developed a theory that there's cry: to blur vision "leave us helpless tears and function as a sign of submission."
So there are many different theories, but few: the tears do not seem to get the attention of researchers: for every dozen books about laughter, there is only one on the tears. The most important of these is perhaps Crying: The Mystery of Tears, the physiologist Arhtur Koestler.
While waiting for the investigations continue crying.
extraído de la pagina : http://www.xatakaciencia.com/biologia/cual-es-la-funcion-de-llorar-las-lagrimas-emocionales-tienen-una-composicion-distinta-a-las-lagrimas-que-lubrican-el-ojo
