一项关于衰老过程中口语单词识别时具体性效应的功能磁共振成像研究。是保留还是衰减？
An fMRI Study of Concreteness Effects during Spoken Word Recognition in Aging. Preservation or Attenuation?
作者信息
Roxbury Tracy, McMahon Katie, Coulthard Alan, Copland David A
机构信息
University of Queensland Centre for Clinical Research, University of QueenslandBrisbane, QLD, Australia; School of Health and Rehabilitation Sciences, University of QueenslandBrisbane, QLD, Australia; Centre for Advanced Imaging, University of QueenslandBrisbane, QLD, Australia.
Centre for Advanced Imaging, University of Queensland Brisbane, QLD, Australia.
出版信息
Front Aging Neurosci. 2016 Jan 12;7:240. doi: 10.3389/fnagi.2015.00240. eCollection 2015.
It is unclear whether healthy aging influences concreteness effects (i.e., the processing advantage seen for concrete over abstract words) and its associated neural mechanisms. We conducted an fMRI study on young and older healthy adults performing auditory lexical decisions on concrete vs. abstract words. We found that spoken comprehension of concrete and abstract words appears relatively preserved for healthy older individuals, including the concreteness effect. This preserved performance was supported by altered activity in left hemisphere regions including the inferior and middle frontal gyri, angular gyrus, and fusiform gyrus. This pattern is consistent with age-related compensatory mechanisms supporting spoken word processing.
健康衰老是否会影响具体性效应（即具体词汇相对于抽象词汇所表现出的加工优势）及其相关的神经机制尚不清楚。我们对年轻和年长的健康成年人进行了一项功能磁共振成像（fMRI）研究，让他们对具体词汇和抽象词汇进行听觉词汇判断。我们发现，对于健康的年长个体来说，具体词汇和抽象词汇的口语理解能力相对得以保留，包括具体性效应。这种保留的表现得到了左半球区域活动变化的支持，这些区域包括额下回、额中回、角回和梭状回。这种模式与支持口语加工的年龄相关补偿机制相一致。
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