lulabelle answered Wednesday June 21 2006, 11:47 am: We cry in a physiological response to an emotional upset. During these upsets our bodies are working overtime producing hormones. The crying process helps us to eliminate these extra hormones that we don’t need. These chemicals and hormones disappear from our bodies in the form of tears and as our tears flow and eliminate these chemicals and hormones we become more soothed. This is one reason why people feel better after crying.
kristen22 answered Wednesday June 21 2006, 10:56 am: A sick baby cries long and plaintively in the night. A young woman sobs in despair and disbelief at her husband’s death in the September 11 attacks. Under cover of darkness, tears swell in the eyes of a grown man watching the movie Titanic. As others grin and congratulate a bride, her mother weeps uncontrollably. Crying is at once among the most familiar and the most mysterious of human behaviors. Certainly human facial anatomy and physiology are intricately engineered for both the discharge of tears and the facial and vocal expressions that accompany them—but for what purpose?
Observing that we shed tears on our face—the part of our body most visible and conspicuous to our social companions—some people have theorized that crying evolved as one of the many facial movements by which we communicate.
Crying may have evolved to call attention to our distress by exaggerating the normal tearing that occurs when the facial nerve is activated. We can see this normal tearing when yawning or laughing too hard makes our eyes water, or when irritation of our eyes and the area around them stimulates tearing. It seems likely that, in our distant past, tearing, together with vocalization, greatly increased the chances for survival of those infants who had acquired this capacity through random genetic mutation. As a result of the advantage it conferred, the behavior became lodged in our genome, and tears became a sign, and a symbol, of suffering.
blue_sunlyte answered Wednesday June 21 2006, 7:13 am: Here's some information about crying that I found out:
Three types of tears have been identified physiologically. Basal or continuous tears which lubricate the eye, reflex tears when chopping onions and emotional tears, which have psychological meaning. There is some evidence that the different types of tears have different chemical and hormonal compositions (Frey & Langseth 1985, Van Haeringen 1981). Crying follows a physiological pattern which often starts with a distressing thought, memory or experience and consists of distinct patterns of restricted breathing with tears building up to a crescendo, in which the sobbing is at its most rapid and intense and after which the person relaxes. The thoughts and memories cease to evoke an intense response. It is at this stage that people often report the feeling of relief conveyed by the expression 'having a good cry'. A very similar pattern is found in laughter, particular the infectious laughter of a group, again with tears but the starting stimulus involves humour rather than sadness or loss.
Whatever the process might involve, it would seem that tears are a special example of emotional processing. They share a stimulus input, an affective experience and behavioural expression as outlined in the emotional processing model.
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