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儿童和青少年的智力能力和皮质发育
P Shaw1, D Greenstein, J Lerch
1Child Psychiatry Branch, National Institute of Mental Health, Bethesda, Maryland 20182, USA. shawp@mail.nih.gov
Nature
|March 31, 2006
概括
儿童的智力与他们的大脑如何运作有关.
科学领域:
- 神经科学是一个神经科学.
- 发展心理学 发展心理学
- 认知科学 认知科学
背景情况:
- 一般智力是一个稳定的特征,但它在发育大脑中的神经解剖学基础尚不清楚.
- 以前的研究还没有完全阐明儿童大脑结构和智力之间的关系.
- 了解智力的神经基础对于认知发展研究至关重要.
研究的目的:
- 研究儿童和青少年一般智力的神经解剖相关性.
- 为了确定皮质厚度或它的发育轨迹是否与智力更密切相关.
- 探索与智力发展相关的大脑结构的动态变化.
主要方法:
- 纵向研究设计,追踪随时间推移的大脑发育.
- 对大脑皮层厚度变化与智力相关的分析.
- 专注于皮层厚度与智力之间的相关性中的发育转变.
主要成果:
- 皮层厚度变化的轨迹,而不是静态厚度,与智力相关.
- 智力和皮层厚度之间的发展转变发生,从智力和皮层厚度之间的负相关性转变为正相关性.
- 智力与皮质发育的轨迹有关,特别是在额头区域.
结论:
- 儿童智力的神经解剖表达是动态的,而不是静态的.
- 加快皮层发育和随后的薄化是更聪明的孩子的特征.
- 大脑的可塑性在一般智能的发展中起着重要作用.
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