首页
登录
职称英语
As infants, we live without a sense of the past; as adults, we can recall ev
As infants, we live without a sense of the past; as adults, we can recall ev
游客
2023-07-12
35
管理
问题
As infants, we live without a sense of the past; as adults, we can recall events from decades ago. Scientists have only a vague understanding of this remarkable transition, when our sense of time expands beyond this morning’s feeding and last week’s bath, but now they know a bit more: Conor Liston of Harvard University has determined that the beginnings of long-term recall arise between the ninth and the 17th month of a baby’s life, coinciding with structural changes in the memory- processing regions of the brain. Besides explaining why Junior doesn’t remember last month’s trip to Disney World, these results should help guide future research on the link between early behavioral development and changes in the infant brain.
"It wasn’t clear how long children in the first year of life could retain a memory of an event," Liston says. We were interested in testing the hypothesis that neurological developments at the end of the first year and the beginning of the second would result in a significant Enhancement in this kind of memory.
Liston showed a simple demonstration to infants ages 9, 17, or 24 months old. The test results showed a huge difference between the test children Who had been 9 months old when they saw the first demonstration and those who had been older. "Whereas 9-month-olds don’t I really remember a thing after four months, 17-and 24-month-olds do," Liston says. "Something is happening in the brain between 9 and 17 months old that enables children to encode these memories efficiently and in such a way that they can be retained and retrieved after a long period of time," Liston says. Researchers believe that changes in certain regions of the brain’s frontal lobe and the hippocampus, which axe associated with memory retention and retrieval, drive the rapid expansion of childhood recall. Previous studies have shown that the frontal lobes in humans begin to mature during the last quarter of the first year of life.
Liston’s work may help explain why adults can rarely remember anything from before their second birthday or so. Most people simply accept this "infant amnesia" as a fact of life. "But it’s not clear why a 40-year-old has plenty of memories for something that happened 20 years ago, but a 20- year-old has basically no memories for something that happened when he was 2 or 3 ," Liston says. He suggests that the same brain mechanisms that were not yet able to encode long-term memories in 9-month-olds may also play some role in adults’ inability to remember events of infancy. Researchers still need to look at other areas of cognition -- such as what role language ability plays in memory -- to really fully understand why people can’ t remember anything that happened before 2--3 years of age. But one thing is clear: When l-year-old Snookums claims he doesn’t remember breaking the heirloom chitin five months ago, he’s almost surely telling the truth. [br] According to Liston, ______ initiate(s) the long-term recall ability of a child.
选项
A、early behavioral development
B、the memory-processing regions of the brain
C、the changes in the brain between 9 and 17 months old
D、the changes in the brain between 17 and 24 months old
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2831448.html
相关试题推荐
Hewasunderthe______thathecouldaccomplish-thewholejobwithoutthehelp
Withoutairresistance,allobjectswouldfallatthesamespeed______theirwe
Withoutthefrictionbetweentheirfeetandtheground,peoplewould___________
Nootherreproductioninanyformispermitted______(未将出版社书面同意).withoutwritten
Asthesayinggoes,readingwithoutreflectingislikeeatingwithout______.A、c
Japan’soldimperialarmyneverwentintothefieldwithoutagroupof"comf
Japan’soldimperialarmyneverwentintothefieldwithoutagroupof"comf
Japan’soldimperialarmyneverwentintothefieldwithoutagroupof"comf
[originaltext]About1in20adultsintheUnitedStatescannotreadEnglish.A
Therailroadindustrycouldnothavegrownaslargeasitdidwithoutsteel.The
随机试题
Forthispart,youareallowed30minutestowriteacompositiononthetopicEl
CovingtonCollegehasfourfull-timeClassicsprofessors,butonly12Classicsm
Didyouknowthatallhumanbeingshavea"comfortzone"regulatingthedist
关于门静脉描述错误的是A.分为左、右支 B.与肝动脉、胆道系统伴行 C.由肠
案例: 下面是在完成“探究摩擦力的大小与什么因素有关”的实验后,教师对实验进行
选择性钙通道阻滞药根据化学结构分为二氢吡啶类(硝苯地平)、地尔硫类(地尔硫)、苯
发审委委员在审核上市公司非公开发行股票申请和中国证监会规定的其他非公开发行证券申
(2015年真题)对于火电厂扩建工程,应列入环保投资内容有()。A.环境监
关于影响无黏性土体抗剪强度因素的正确说法是( )。 A.土体颗粒级配越均
男性,21岁,骑自行车摔在右腰部,伤后腰部痛,无肉眼血尿。查尿常规:红细胞充满/
最新回复
(
0
)