Age-related changes in early novelty processing as measured by ERPs.
Age-related changes in early novelty processing as measured by ERPs.
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DOI：
10.1016/j.biopsycho.2009.05.003
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发表时间：
2009-09
影响因子：
2.6
通讯作者：
Daffner, Kirk R.
中科院分区：
文献类型：
--
作者：
Riis, Jenna L.;Chong, Hyemi;McGinnnis, Scott;Tarbi, Elise;Sun, Xue;Holcomb, Phillip J.;Rentz, Dorene M.;Daffner, Kirk R.
本研究采用事件相关电位（ERPs）研究了新视觉刺激早期加工的年龄相关变化。匹配良好的老年人（n=30），中年人（n=30），和年轻人（n=32）的主题是标准的，目标/罕见的，和感知新颖的视觉刺激下注意和忽视的条件。我们的研究结果表明，前P2分量指数的动机显着性的刺激，无论是任务的相关性或新奇性。集中注意力的增强不会随着年龄的增长而减少。它对新刺激的反应在老年人中特别引人注目。与年龄相关的增加，在前P2到新的视觉刺激似乎并不是由于与老化相关的抑制控制受损。相反，增强前P2到新的刺激在老年人可能与年龄相关的变化过程中的匹配不寻常的视觉刺激存储的表示，这是索引的时间重叠的前N2分量的幅度大幅降低随着年龄的增长。
This study investigated age-related changes in the early processing of novel visual stimuli using ERPs. Well-matched old (n=30), middle-aged (n=30), and young (n=32) subjects were presented standard, target/rare, and perceptually novel visual stimuli under attend and ignore conditions. Our results suggest that the anterior P2 component indexes the motivational salience of a stimulus as determined by either task relevance or novelty. Its enhancement by focused attention does not decrease with age. Its responsiveness to novel stimuli is particularly striking in older adults. The age-related increase in the anterior P2 to novel visual stimuli does not appear to be due to impaired inhibitory control associated with aging. Rather, the enhanced anterior P2 to novel stimuli in older adults may be linked to age-related changes in the process of matching unusual visual stimuli to stored representations, which is indexed by the temporally overlapping anterior N2 component whose amplitude substantially decreases with age.
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影响因子：
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