現在位置 : 健康2 > 緩解疼痛的策略：雙臂交叉？- Cross Your Arms
【24drs.com】 2011/5/27 上午 10:10:23
Pain Relief Strategy: Cross Your Arms?
Study Suggests Crossing Your Arms Can Reduce Pain by Confusing the Brain's Pain Signals
By Jennifer Warner WebMD Health News
May 20, 2011 -- Crossing your arms may confuse the brain and help fight pain, according to a new study.
The study suggests crossing arms at the wrists mixes up the brain's perception of pain signals sent from the hands to the brain and reduces the intensity of pain.
Researchers say the findings may lead to new therapies to treat painful conditions by manipulating the brain's perception of the body.
"Perhaps when we get hurt, we should not only "rub it better" but also cross our arms," says researcher Giandomenico Iannetti, MD, of University College London, in a news release.
Conflicting Information From the Brain
In the study, published in Pain, researchers used a laser to deliver a pin-prick-like pain sensation to the hands of eight adult volunteers in two different positions. The first time, the participants had their hands at their sides and the second time they crossed their arms over the center of their bodies.
Crossing your arms 'relieves hand pain'
Crossing your arms across your body after injury to the hand could relieve pain, researchers suggest.
20 May 2011 Last updated at 00:36 GMT
The University College London team, who undertook a proof-of-concept study of 20 people, say the brain gets confused over where pain has occurred.
In the journal Pain, they suggest this is because putting hands on the "wrong" sides disrupts sensory perception.
Pain experts say finding ways of confusing the brain is the focus of many studies.
The team used a laser to generate a four millisecond pin-prick of pain to participants' hands, without touching them.
Each person ranked the intensity of the pain they felt, and their electrical brain responses were also measured using electroencephalography (EEG).
The results from both participants' reports and the EEG showed that the perception of pain was weaker when the arms were crossed over the "midline" - an imaginary line running vertically down the centre of the body.
Dr Giandomenico Iannetti, from the UCL department of physiology, pharmacology and neuroscience, who led the research, said: "In everyday life you mostly use your left hand to touch things on the left side of the world, and your right hand for the right side of the world.
Perhaps when we get hurt, we should not only 'rub it better' but also cross our arms ” Quote Dr Giandomenico Iannetti, UCL
"This means that the areas of the brain that contain the map of the right body and the map of right external space are usually activated together, leading to highly effective processing of sensory stimuli.
"When you cross your arms these maps are not activated together anymore, leading to less effective brain processing of sensory stimuli, including pain, being perceived as weaker."
He said the discovery could potentially lead to new ways of treating pain that exploit this confusion.
Dr Iannetti he added: "Perhaps when we get hurt, we should not only 'rub it better' but also cross our arms."
His team, alongside Australian researchers, are now testing the theory on patients who have chronic pain conditions.
A spokesman for the Pain Relief Foundation said a lot of research into relieving chronic pain was looking into ways of confusing the brain and disrupting pain messages.
Crossing arms reduces pain: mini-lecture (UCL)