慢性疲劳综合症由压力引起-凯发k8官网

慢性疲劳综合症由压力引起
文章来源:未知 文章作者:enread 发布时间:2012-11-26 07:37 字体: [ ] 
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australian researchers have discovered for the first time that reduced heart rate variability -- or changes in heart beat 1 -- best predicts 2 4, such as concentration difficulties commonly reported by people with 5 6 7 (cfs慢性疲劳综合症). this adds to the growing body of evidence linking autonomic nervous system imbalance to symptoms of this poorly understood 8. the findings are reported in the journal plos one.
 
chronic fatigue syndrome is characterised by medically unexplained, disabling fatigue and neuropsychiatric symptoms of at least six months' duration. the 3 9 the symptoms in cfs is still poorly understood.
 
"we have studied autonomic function in cfs for some time and our findings clearly indicate a loss of integrity in stress-responsive 10 and 11 systems in cfs. patients with this condition are hyper-responsive to challenges arising both from within the body and from the environment," says lead researcher, associate professor ute vollmer-conna of the university of new south wales in sydney, australia.
 
"even when they sleep, their stress-responsive neural systems are on high alert, signalling that it is not safe to relax. i think this condition may be understood by analogy to post-traumatic stress disorder, just that in cfs the original 12 is most likely a physiological, internal one, such as a severe infection."
 
in a study of 30 patients with cfs and 40 healthy individuals, unsw researchers recorded the heart beats of participants (via ecg) and analysed cardiac responses to cognitive challenges, and associations with mental performance outcomes.
 
the patients with cfs performed with similar accuracy, but they took significantly longer to complete the tests than people without the condition. they also had greater heart rate reactivity; low and unresponsive heart rate variability; and prolonged heart rate-recovery after the cognitive challenge.
 
resting heart rate variability (an index of vagus nerve activity) was identified as the only significant predictor of cognitive outcomes, while current levels of fatigue and other symptoms did not relate to cognitive performance.
 
"this is the first 13 of an association between reduced cardiac vagal(迷走神经的) tone and cognitive impairment in cfs. our findings confirm previous reports of a significant loss of vagal 14, which becomes particularly apparent when 15 with challenging tasks. the current results are consistent with the notion that cfs represents a 'system under stress'," associate professor vollmer-conna says.
 
the findings could lead to new ways to improve cognitive difficulties in people with cfs, including biofeedback assisted retraining of autonomic functioning, the researchers say.


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1 rguzgc     
n.时间安排,时间选择
参考例句:
  • the timing of the meeting is not convenient.会议的时间安排不合适。
  • the timing of our statement is very opportune.我们发表声明选择的时机很恰当。
2 uqwz0     
adj.认知的,认识的,有感知的
参考例句:
  • as children grow older,their cognitive processes become sharper.孩子们越长越大,他们的认知过程变得更为敏锐。
  • the cognitive psychologist is like the tinker who wants to know how a clock works.认知心理学者倒很像一个需要通晓钟表如何运转的钟表修理匠。
3 bsnxk     
n.动乱,骚动;打扰,干扰;(身心)失调
参考例句:
  • he is suffering an emotional disturbance.他的情绪受到了困扰。
  • you can work in here without any disturbance.在这儿你可不受任何干扰地工作。
4 a0726bd74d4516cd6fbe05e362bc74af     
n.骚乱( disturbance的名词复数 );打扰;困扰;障碍
参考例句:
  • the government has set up a commission of inquiry into the disturbances at the prison. 政府成立了一个委员会来调查监狱骚乱事件。
  • extra police were called in to quell the disturbances. 已调集了增援警力来平定骚乱。
5 bo9zl     
adj.(疾病)长期未愈的,慢性的;极坏的
参考例句:
  • famine differs from chronic malnutrition.饥荒不同于慢性营养不良。
  • chronic poisoning may lead to death from inanition.慢性中毒也可能由虚弱导致死亡。
6 phvzv     
n.疲劳,劳累
参考例句:
  • the old lady can't bear the fatigue of a long journey.这位老妇人不能忍受长途旅行的疲劳。
  • i have got over my weakness and fatigue.我已从虚弱和疲劳中恢复过来了。
7 uqbwu     
n.综合病症;并存特性
参考例句:
  • the institute says that an unidentified virus is to blame for the syndrome. 该研究所表示,引起这种综合症的是一种尚未确认的病毒。
  • results indicated that 11 fetuses had down syndrome. 结果表明有11个胎儿患有唐氏综合征。
8 et1x4     
n.紊乱,混乱;骚动,骚乱;疾病,失调
参考例句:
  • when returning back,he discovered the room to be in disorder.回家后,他发现屋子里乱七八糟。
  • it contained a vast number of letters in great disorder.里面七零八落地装着许多信件。
9 5fyz8c     
adj.在下面的,含蓄的,潜在的
参考例句:
  • the underlying theme of the novel is very serious.小说隐含的主题是十分严肃的。
  • this word has its underlying meaning.这个单词有它潜在的含义。
10 dnxzft     
adj.神经的,神经系统的
参考例句:
  • the neural network can preferably solve the non- linear problem.利用神经网络建模可以较好地解决非线性问题。
  • the information transmission in neural system depends on neurotransmitters.信息传递的神经途径有赖于神经递质。
11 aavyk     
adj.生理学的,生理学上的
参考例句:
  • he bought a physiological book.他买了一本生理学方面的书。
  • every individual has a physiological requirement for each nutrient.每个人对每种营养成分都有一种生理上的需要。
12 tjizj     
n.外伤,精神创伤
参考例句:
  • counselling is helping him work through this trauma.心理辅导正帮助他面对痛苦。
  • the phobia may have its root in a childhood trauma.恐惧症可能源于童年时期的创伤。
13 9waxo     
n.表明,示范,论证,示威
参考例句:
  • his new book is a demonstration of his patriotism.他写的新书是他的爱国精神的证明。
  • he gave a demonstration of the new technique then and there.他当场表演了这种新的操作方法。
14 meixk     
n.调制
参考例句:
  • the soft modulation of her voice soothed the infant. 她柔和的声调使婴儿安静了。
  • frequency modulation does not allow static to creep in. 频率调制不允许静电干扰混入。
15 nvjzwp     
n.经商方法,待人态度
参考例句:
  • this store has an excellent reputation for fair dealing.该商店因买卖公道而享有极高的声誉。
  • his fair dealing earned our confidence.他的诚实的行为获得我们的信任。
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