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
2024-02-13
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 this passage, ______ may promote the rapid expansion of childhood recall.
选项
A、the development of a sense of the past
B、the last quarter of the first year of life
C、certain regions of the brain
D、the maturation of the frontal lobes in humans
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3447713.html
相关试题推荐
Memoryisourmostimportantpossession.Withoutmemory,youwouldn’tknoww
Memoryisourmostimportantpossession.Withoutmemory,youwouldn’tknoww
Memoryisourmostimportantpossession.Withoutmemory,youwouldn’tknoww
Memoryisourmostimportantpossession.Withoutmemory,youwouldn’tknoww
Memoryisourmostimportantpossession.Withoutmemory,youwouldn’tknoww
Memoryisourmostimportantpossession.Withoutmemory,youwouldn’tknoww
[originaltext]Weuseallsortofserviceswithoutthinkingabouthowweget
[originaltext]Weuseallsortofserviceswithoutthinkingabouthowweget
Onlinebillpaycanhelpyoumanageyourbillswithouthavingtoworryabout
Onlinebillpaycanhelpyoumanageyourbillswithouthavingtoworryabout
随机试题
患者身大热,口大渴、汗大出、脉洪大,治宜选用的方为A.大承气汤 B.黄连解毒汤
航空货物运输中,关于活体动物的运输,下列说法正确的有( )。A.出生72小时内
内服善于治疗下焦血热出血证,外用又能疗烫伤、湿疹的药物是A、白及 B、地肤子
关于净额结算的不同的分类,下列说法错误的是()。A.按净额交收的标的区分,有券
某人接受抗哮喘的药物治疗,医生称所用药物具有较高的治疗指数。下面有关该药治疗指数
尼可刹米属于A.生物碱类中枢兴奋药 B.酰胺类中枢兴奋药 C.黄嘌呤类中枢兴
期刊:杂志A.水果:柠檬 B.酱油:食品 C.油墨:印刷 D.皮肤
在分红保险中,红利分配方式有()。A.现金红利和变额红利 B.现金红利和
投资者进行一项投资可能接受的最低收益率是()。 A.预期收益率B.货币时
2×20年1月1日,甲公司以银行存款360万元取得一项专利权,并于
最新回复
(
0
)