Rapid Mental Fatigue Amplifies Age-Related Attentional Deficits
Rapid Mental Fatigue Amplifies Age-Related Attentional Deficits
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DOI：
10.1027/0269-8803/a000127
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发表时间：
2014
影响因子：
1.3
通讯作者：
E. Wascher;Stephan Getzmann
中科院分区：
文献类型：
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作者：
E. Wascher;Stephan Getzmann
随着年龄的增长，信息处理的不足被认为是额叶执行控制功能效率降低的原因。多巴胺被认为在这种下降中起着核心作用。然而，多巴胺对于在较长时间内保持动力也是必不可少的，因此是精神疲劳的核心因素。结合这两个发现，我们测试了老年人比年轻人更容易因任务时间增加而导致性能损失的程度。12名年轻人和12名老年参与者进行了80分钟的抑制返回任务。老年参与者的表现下降，但在年轻人。然而，事件相关电位（ERP）的脑电图，显示出明显的变化，随着时间的任务，主要是年轻的参与者。行为和ERP结果之间的分离表明，年轻参与者的ERP变化可能反映了对任务的适应，而不是疲劳。这一点从位置的明显变化中可以看出。
Deficient information processing with increasing age has been assigned to reduced efficiency in frontal executive control functions. Dopamine has been assumed to play a central role for this decline. Dopamine, however, is also essential for the maintenance of motivation for a longer period of time and is therefore a core factor for mental fatigue. Combining these two findings, we tested to what degree older adults are more prone to performance loss due to increasing time on task than younger adults. Twelve younger and twelve older participants performed an inhibition of return task for 80 min. Performance declined in the older participants but not in the young. Event-related potentials (ERPs) of the EEG, however, showed distinct changes with time on task primarily for young participants. The dissociation between behavioral and ERP results indicates that changes in ERPs of the young participants could reflect adaptations to the task rather than fatigue. This is evident from very distinct changes of the pos...