首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
A new study on mice uncovers some answers that could someday offer a powerful target for eliminating the recurrence of bad memor
A new study on mice uncovers some answers that could someday offer a powerful target for eliminating the recurrence of bad memor
admin
2014-05-20
103
问题
A new study on mice uncovers some answers that could someday offer a powerful target for eliminating the recurrence of bad memories in humans, especially known to those who suffer from post-traumatic stress disorder(PTSD: mental disorder caused by accidents of emergency).
"Fear memories are the most robust memories—they can last over a lifetime," says Nadine Gogol-la, a biologist at Harvard University and lead author on the paper published recently in the journal Science. "You can push them far back, but spontaneous recovery and relapses will happen. " Until now, science has been unable to stop this process—in humans or in mice.
By repeating the previously reported rat findings, Gogolla and her colleagues found that at some point during a young mouse’s development—between about 16 and 23 days postnatal—a molecular net of sorts is cast over a region of the brain called the amygdala, effectively crystallizing formerly changeable memories.
"It looks just like what you would expect from a fisherman’s net," says Gogolla of the protein matrix(a living part in which something is formed)under the microscope. "And it acts as a structural constraint on the cells. How it does that, nobody really knows. " But the result is that memories are held inside. What the researchers did learn was that by cutting that net—with an injection of an enzyme that digests the chains linking the matrix together—memories could be once again destabilized.
"The drug cuts the net into its pieces," Gogolla says, "just like when you cut the strings of a net and it falls apart. " Then, for a couple of weeks, the original youthful plasticity in the neuronal circuits of the amygdala is regained and any bad memory formed after the matrix digestion could be subsequently eliminated through "extinction" therapy, a common treatment during which a patient is presented with the original fear trigger but in a context that is not fearful. When the treatment was given after a mouse underwent fear conditioning, however, extinction was unable to cut out that memory completely.
"Because the treatment has to occur before a traumatic event, it’s hard to make it immediately available," notes Gogolla. " But it does help us in finding the underlying mechanisms. " Eventually, she hopes tools can be found that can be applied after fear—inducing experiences, and that translate from mice to humans. This would be welcome relief for the approximately 20 percent of all military personnel who have returned from Iraq and Afghanistan reporting symptoms of PTSD, not to mention for heartbroken couples.
It can be inferred from the passage that ______.
选项
A、war is one of the main causes of PTSD
B、extinction therapy involves moral issues
C、Gogolla often writes for the journal Science
D、fearful memories will recover spontaneously
答案
A
解析
推理题。本文最后一段指出,格古拉和她的同事们正在寻找能够在恐怖经历发生之后使用的治疗方法,如果能够找到,这对从伊拉克和阿富汗归来的军人无疑将是一个福音,因为据报道他们中有大约20%的人有创伤后应激障碍症状。因此,可以推断出选项[A]为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/NtO4777K
0
考研英语一
相关试题推荐
Ourape-menforefathershadnoobviousnaturalweaponsinthestrugglefor【1】intheopen.Theyhadneitherthepowerfulteethno
Ourape-menforefathershadnoobviousnaturalweaponsinthestrugglefor【1】intheopen.Theyhadneitherthepowerfulteethno
Ourape-menforefathershadnoobviousnaturalweaponsinthestrugglefor【1】intheopen.Theyhadneitherthepowerfulteethno
Ourape-menforefathershadnoobviousnaturalweaponsinthestrugglefor【1】intheopen.Theyhadneitherthepowerfulteethno
Ourape-menforefathershadnoobviousnaturalweaponsinthestrugglefor【1】intheopen.Theyhadneitherthepowerfulteethno
Ourape-menforefathershadnoobviousnaturalweaponsinthestrugglefor【1】intheopen.Theyhadneitherthepowerfulteethno
Ourape-menforefathershadnoobviousnaturalweaponsinthestrugglefor【1】intheopen.Theyhadneitherthepowerfulteethno
Ourape-menforefathershadnoobviousnaturalweaponsinthestrugglefor【1】intheopen.Theyhadneitherthepowerfulteethno
随机试题
女性,52岁,反复呕血2年,1天前突然又呕血,胃镜确诊为食管静脉曲张出血。体格检查:贫血貌.血压80/60mmHg,蛙状腹,脾肋下3cm。肝功能检查:ALT120U(赖氏法),A/G比值为0.82:1,总胆红素(STB)35μmol/L。最宜采用
关于显微血管外科,哪一项是错误的
婴儿期每天能量及水的需要量约是
王某对县民政局的决定不服向法院提起行政诉讼,县民政局向法院提供了由民政部制定的规章和该局发布的文件证明其决定合法。法院审查后认为规章和文件均合法有效。有关法院在判决书对二者的适用和引用,下列哪一项说法是正确的?()
影响设备无形磨损的因素有()
在确立贷款意向后,银行需要向客户索取贷款申请资料,除借款申请书等借款人资料外,根据贷款类型的不同,还需要索取其他相关资料。如果为抵(质)押贷款,借款人还需要提供的资料包括()。
下列资本成本变动的影响因素中,属于内部因素的有()。
下列关于激光的说法错误的是:
发展经济_________可以为城市文化增加筹码,_________文化传承、文化内涵的提升以及文化事业的发展,_________不可或缺的,城市的文化含金量如何,并不在于能否造起几幢标志性建筑,而是取决于市民的文化素质。依次填入画横线部分最恰当的一项是(
计算机网络最突出的优点是
最新回复
(
0
)