An fMRI Study of Concreteness Effects during Spoken Word Recognition in Aging. Preservation or Attenuation?

被引：18
作者：
Roxbury, Tracy [1 ,2 ,3 ]
McMahon, Katie [3 ]
Coulthard, Alan [4 ,5 ]
Copland, David A. [1 ,2 ]
机构：
[1] Univ Queensland, Ctr Clin Res, Brisbane, Qld, Australia
[2] Univ Queensland, Sch Hlth & Rehab Sci, Brisbane, Qld, Australia
[3] Univ Queensland, Ctr Adv Imaging, Brisbane, Qld, Australia
[4] Royal Brisbane & Womens Hosp, Dept Med Imaging, Brisbane, Qld, Australia
[5] Univ Queensland, Acad Discipline Med Imaging, Brisbane, Qld, Australia
来源：
FRONTIERS IN AGING NEUROSCIENCE | 2016年 / 7卷
基金：
澳大利亚研究理事会;
关键词：
aging; concreteness; fMRI; concrete; abstract; spoken word; auditory; OLDER-ADULTS; ABSTRACT WORDS; BRAIN ACTIVITY; NEURAL REPRESENTATION; PROCESSING CONCRETE; ITEM CONCRETENESS; LEXICAL DECISION; SEMANTIC SYSTEM; AGE-DIFFERENCES; FUNCTIONAL MRI;
D O I：
10.3389/fnagi.2015.00240
中图分类号：
R592 [老年病学]; C [社会科学总论];
学科分类号：
03 ; 0303 ; 100203 ;
摘要：
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.
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页数：12
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