V**n
发帖数: 560 | 1 【 以下文字转载自 NextGeneration 讨论区 】
发信人: Vjin (Haha), 信区: NextGeneration
标 题: 【Nature： SA Mind 为什么小孩忘记三四岁以前的事】
发信站: BBS 未名空间站 (Fri Aug 24 17:31:46 2012, 美东)
Nature： SA Mind 八月文章
http://www.nature.com/scientificamericanmind/journal/v23/n4/ful
很感兴趣， 但是没有订阅权限
有没有人能post, 谢谢！ | V**n
发帖数: 560 | 2 share
发信人: sphinx (小糊涂仙), 信区: NextGeneration
标 题: Re: 【Nature： SA Mind 为什么小孩忘记三四岁以前的事】
发信站: BBS 未名空间站 (Fri Aug 24 19:31:27 2012, 美东)
Our inability to remember many of our early experiences is a phenomenon
known as childhood (or infantile) amnesia. Exactly why we forget these
memories remains a mystery, although two hypotheses put forth possible
explanations.
The brain systems that support our memory of experiences—the hippocampus
and medial temporal lobe—appear to function reasonably well by the end of
the first year of life. Infants and toddlers can remember such things as
receiving a gift from a favorite uncle or breaking a beloved toy. After
early childhood, however, these memories fade or disappear.
One idea is that the brain's prefrontal cortex may not contribute adequately
to memory formation at young ages. A recollection of an event consists of a
number of pieces of information that, when tied together, create a full
picture. Across all ages, we try to summon a memory by using an initial bit
of information (a “retrieval cue”) that helps to initiate recall.
Some parts of the memory are not really central to an event, such as where
you were standing when you took your first step, but are important for
recall. Remembering such contextual information invokes the prefrontal
cortex, which develops throughout childhood and even into adulthood. If this
part of the brain is not assisting in memory formation early in life, then
children may not form vivid, lasting recollections until they are a little
bit older.
Another possibility is that our mental representations of the world—the
elements from which we form thoughts and memories—change during the first
few years of life. For example, it is very likely that learning language
during these young years dramatically alters how children see the world.
Very early memories from our prelanguage mental representations might become
harder and harder to remember as we mature.
Our brain's flexibility and capacity to learn new information and adapt to
new experiences are extremely valuable to our survival. It appears that an
accidental consequence of this trait is amnesia regarding our early lives.
Maturing—putting our childish ways behind us—may cost us our young
memories.
【在 V**n 的大作中提到】
: 【 以下文字转载自 NextGeneration 讨论区 】
: 发信人: Vjin (Haha), 信区: NextGeneration
: 标 题: 【Nature： SA Mind 为什么小孩忘记三四岁以前的事】
: 发信站: BBS 未名空间站 (Fri Aug 24 17:31:46 2012, 美东)
: Nature： SA Mind 八月文章
: http://www.nature.com/scientificamericanmind/journal/v23/n4/ful
: 很感兴趣， 但是没有订阅权限
: 有没有人能post, 谢谢！
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