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不断变化的大脑
The Changing Brain |
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| 课程网址: |
http://videolectures.net/mitworld_bear_chbr/
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| 主讲教师: |
Mark Bear
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| 开课单位: |
麻省理工学院
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| 开课时间: |
2010-09-08
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| 课程语种: |
英语
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| 中文简介: |
我们的右眼和左眼如何接收两个独立的视觉信息流，最终只能看到一个世界观？几十年来，这个问题一直受到神经科学家的密切关注，马克·贝尔在他的讲座中给我们带来了最新的知识。视觉皮层中的单个神经元响应特定的刺激（例如方向或颜色），然后大脑进行一些奇特的过滤以仅处理双眼匹配的刺激。贝尔描述了突破性的实验，研究人员将小猫的眼睛关闭了一天左右，发现它在打开后实际上是“盲目的”。将视觉信息关联以产生双目图像取决于在视觉皮层发育的“关键时期”期间锻造的神经连接。贝尔与视觉系统神经递质的合作已经发现了与脆性X染色体综合症等条件的有趣联系。这种形式的精神发育迟滞可能是由于出生后平行关键期间类似的神经连接丧失所致。
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| 课程简介: |
How do our right and left eyes take in two separate streams of visual information and end up with a single view of the world? This question has come under intense scrutiny from neuroscientists for decades, and Mark Bear brings us up to date in his lecture. Single neurons in the visual cortex respond to particular stimuli (such as direction or color) and then the brain does some fancy filtering to process only the stimuli that match up in both eyes. Bear describes breakthrough experiments where researchers closed the eye of a kitten for just a day or so, and found that it was effectively “blind” after it opened. Correlating visual information to produce binocular images depends on neural connections that are forged during a “critical period” of visual cortex development. Bear’s work with visual system neurotransmitters has turned up intriguing connections to conditions like Fragile X syndrome. This form of mental retardation may result from a similar loss of neural connections during a parallel critical period after birth.
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| 关 键 词: |
视觉信息流; 神经科学家; 神经连接
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| 课程来源: |
视频讲座网
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| 最后编审: |
2019-05-20：cwx
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| 阅读次数: |
42
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