语义记忆：抽象性和效价的不同神经表征。
Semantic memory: distinct neural representations for abstractness and valence.
作者信息
Skipper Laura M, Olson Ingrid R
机构信息
Department of Psychology, Temple University, Philadelphia, PA 19122, United States.
Department of Psychology, Temple University, Philadelphia, PA 19122, United States.
出版信息
Brain Lang. 2014 Mar;130:1-10. doi: 10.1016/j.bandl.2014.01.001. Epub 2014 Feb 19.
The hypothesis that abstract words are grounded in emotion has been supported by behavioral research and corpus studies of English words. A recent neuroimaging study reported that a single brain region, the rostral anterior cingulate cortex (rACC), is responsive to abstract words, and is furthermore modulated by the emotional valence. This finding is surprising because the rACC is not commonly associated with semantic processing. It is possible that the effects observed were driven not by abstractness, but rather by valence, since the abstract words used in that study were significantly more emotional than the concrete words. We tested this hypothesis by presenting participants with words that were abstract/concrete, as well as emotionally valenced/neutral in a 2×2 factorial design. Activations to emotional words overlapped with both abstract and concrete activations throughout the brain. An ROI analysis revealed that the rACC was responsive to valence, not abstractness, when concreteness and valence unconfounded.
抽象词基于情感这一假设已得到关于英语单词的行为研究和语料库研究的支持。最近一项神经影像学研究报告称，单个脑区，即喙部前扣带皮层（rACC），对抽象词有反应，并且还受到情感效价的调节。这一发现令人惊讶，因为rACC通常与语义处理无关。有可能观察到的效应不是由抽象性驱动的，而是由效价驱动的，因为该研究中使用的抽象词比具体词的情感色彩明显更强。我们通过以2×2析因设计向参与者呈现抽象/具体以及具有情感效价/中性的单词来检验这一假设。对情感词的激活在全脑范围内与抽象词和具体词的激活都有重叠。一项感兴趣区分析表明，当具体性和效价不混淆时，rACC对效价有反应，而不是对抽象性有反应。
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