CRAYING

The term "crying" generally describes when someone sheds tears in reaction to an excited state. Mourn action has been defined as "a complex secretomotor phenomenon is characterized by tears the lacrimal apparatus, without causing any irritation to ocular structures"

Established a biological neural network between the tear duct and human brain areas involved in emotion. It is believed that no other animals can produce tears in response to emoticionados states, although questioned by some scientists.

According to a study of more than 300 adults, on average men cry once a month, and women at least five times each month , especially before and during menstruation when the tears can occur up to five times normal, often without obvious reason such as depression or sadness.
The function and origin of tears is still under investigation.

Theories include those that are simple, as a reaction to pain, and those that are more complex, including non-verbal communication for behavior other aide.

No other species that can shed emotional tears. As a result, scientists believe that crying must be caused by some human behavior is particularly complex. More than a century ago Darwin said that crying was used to attract attention, in particular was used by children. He said the tears act as a red flag to signal stress