Pain is normal. About 75 million U.S. residents endure chronic or
recurrent pain. Migraines plague 25 million of us. And one in six suffer
arthritis.
The global pain industry pulls in more than $50 billion in drugs a year. Yet for chronic pain sufferers, over-the-counter pills are typically little help, whereas morphine and other narcotics can be addictive sedatives.
An overview study published in 2008 in the Journal of General Internal Medicine looked at multiple studies of pain and found "researchers don't yet know how to determine which [treatment] is best for individual patients." From studies of drugs to surgeries and alternative medicines, "We have found that there are huge gaps in our knowledge base," said Dr. Matthew J. Bair, assistant professor of medicine at the Indiana University School of Medicine.
Here's a look at some surprising facts about that achy sensation whose scientific understanding is painfully fuzzy.
www.livescience.com/28599-surprising-facts-about-pain.htmlThe global pain industry pulls in more than $50 billion in drugs a year. Yet for chronic pain sufferers, over-the-counter pills are typically little help, whereas morphine and other narcotics can be addictive sedatives.
An overview study published in 2008 in the Journal of General Internal Medicine looked at multiple studies of pain and found "researchers don't yet know how to determine which [treatment] is best for individual patients." From studies of drugs to surgeries and alternative medicines, "We have found that there are huge gaps in our knowledge base," said Dr. Matthew J. Bair, assistant professor of medicine at the Indiana University School of Medicine.
Here's a look at some surprising facts about that achy sensation whose scientific understanding is painfully fuzzy.
Scientists don't understand pain
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When you're in pain, you know it. But if scientists could fully grasp how pain works
and why, they might be able to help you more. The American Academy of
Pain Medicine defines pain as "an unpleasant sensation and emotional
response to that sensation." More scientifically, pain is felt when
electrical signals are sent from nerve endings to your brain, which in
turn can release painkillers called endorphins and generate reactions
that range from instant and physical to long-term and emotional.
Some pain is the result of an obvious injury. Other times, pain results from damaged nerves that are not so easy to pinpoint. "Pain is complex and defies our ability to establish a clear definition," said Kathryn Weiner, director of the American Academy of Pain Management. "Pain is far more than neural transmission and sensory transduction. Pain is a complex mixture of emotions, culture, experience, spirit and sensation."
Some pain is the result of an obvious injury. Other times, pain results from damaged nerves that are not so easy to pinpoint. "Pain is complex and defies our ability to establish a clear definition," said Kathryn Weiner, director of the American Academy of Pain Management. "Pain is far more than neural transmission and sensory transduction. Pain is a complex mixture of emotions, culture, experience, spirit and sensation."
Pain may shrink the brain
Credit: YAKOBCHUK VASYL | Shutterstock
If you have chronic pain, you know how demoralizing and debilitating it
can be, physically and mentally. It can prevent a person from
completing routine activities and skyrockets one's irritability for
reasons "others" don't quite understand.
But that's only half of the story. The brains of people with chronic backaches are as much as 11 percent smaller than those of non-sufferers, scientists reported in 2004. Scientists aren't sure why. "It is possible it's just the stress of having to live with the condition," said study leader A. Vania Apkarian of Northwestern University. "The neurons become overactive or tired of the activity."
But that's only half of the story. The brains of people with chronic backaches are as much as 11 percent smaller than those of non-sufferers, scientists reported in 2004. Scientists aren't sure why. "It is possible it's just the stress of having to live with the condition," said study leader A. Vania Apkarian of Northwestern University. "The neurons become overactive or tired of the activity."
Painful migraines and sex go hand-in-hand
Credit: Yuri Arcurs, Shutterstock
It may not eliminate the phrase "Not tonight, honey ..." but a 2006 study found that migraine sufferers had levels of sexual desire
20 percent higher than those suffering from tension headaches. The
finding suggests sexual desire and migraines might be influenced by the
same brain chemical, and getting a better handle on the link could lead
to better treatments, at least for the pain portion of the equation.
Women feel more pain
Credit: Dreamstime
Any man
who has watched a woman having a baby without using drugs would swear
that women could tolerate anything. But the truth is, guys, it hurts
more than you can imagine. Women have more nerve receptors than men. As
an example, women have 34 nerve fibers per square centimeter of facial
skin, whereas men average just 17. And in a 2005 study, women were found
to report more pain throughout their lifetimes and, compared with men, they feel pain in more areas of the body and for longer durations.
Some animals don't feel our pain
Credit: Rochelle Buffenstein/City College of New York.
Animal research could offer clues to eventually relieve human
suffering. Take the naked mole rat, a hairless and nearly blind
subterranean creature. A 2008 study detailed in the journal PLOS Biology
found it feels neither the pain of acid nor the sting of chili peppers. If researchers can figure out why, they might be on the road to new sorts of painkilling therapies for humans.
In 2006, scientists found a pathway for the transmission of chronic pain in rats that they hope will translate into better understanding of human chronic pain. Lobsters feel no pain, even when boiled, scientists said in a 2005 report that is just one more salvo in a long-running debate.
In 2006, scientists found a pathway for the transmission of chronic pain in rats that they hope will translate into better understanding of human chronic pain. Lobsters feel no pain, even when boiled, scientists said in a 2005 report that is just one more salvo in a long-running debate.
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