抽象和具体的语义表示的时空空间动态
Lorenzo Vignali1, Yangwen Xu1, Jacopo Turini2
1Center for Mind/Brain Sciences (CIMeC), University of Trento, Trento, Italy; International School for Advanced Studies (SISSA), Trieste, Italy.
Brain and language
|July 3, 2023
概括
双编码理论建议通过语言和感官代码来表示大脑意义. 这项研究发现,具体的单词激活两者,而抽象的单词最初使用语言代码,后来参与感官区域.
科学领域:
- 认知神经科学 认知神经科学
- 心理语言学 心理语言学
- 神经成像是一种神经成像.
背景情况:
- 双编码理论 (DCT) 假定语义信息是通过不同的语言衍生 (前叶) 和感觉衍生 (感知/运动区域) 神经代码编码的.
- DCT预测具体的概念涉及两个代码,而抽象的概念主要利用语言代码.
研究的目的:
- 通过使用磁脑摄影 (MEG) 来研究抽象与具体概念的语义处理的神经基础.
- 为了测试这个假设,具体的概念涉及语言和感官编码,而抽象的概念依赖于语言编码.
主要方法:
- 使用磁脑电图 (MEG) 来记录大脑活动.
- 参与者判断了视觉呈现词语的感官相关性.
- 对来自65个独立评分的语义特征的抽象和具体语义组件分析了大脑反应.
主要成果:
- 早期激活在前和下脑部区域观察到抽象和具体的语义信息.
- 后来的阶段显示,与抽象特征相比,具体特征在部和部-部区域的激活明显更大.
- 这表明在处理语义具体性时存在时间分离.
结论:
- 这些发现支持了一种序列处理模型,其中单词的具体性最初通过前系统中的跨模态/语言代码进行处理.
- 随后,一个图像学/感官运动代码被投入到具体概念的感知区域.
- 这为语义表示中的双编码理论提供了神经证据.
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