Differential effects of active attention and age on event-related potentials to visual and olfactory stimuli.
Differential effects of active attention and age on event-related potentials to visual and olfactory stimuli.
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DOI：
10.1016/j.ijpsycho.2010.07.008
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发表时间：
2010-11
影响因子：
3
通讯作者：
Murphy, Claire
中科院分区：
文献类型：
--
作者：
Morgan, Charlie D.;Murphy, Claire
正常衰老会损害中枢和外周的嗅觉功能。事件相关电位(Event Related Potential，ERP)的P3峰被认为是中枢认知加工的反映，由对靶刺激的积极反应所诱发。在对听觉和视觉刺激的被动任务中，它也可以被诱发。我们的目标是研究年龄是否在主动任务和被动任务中对嗅觉刺激的事件相关电位的波幅和潜伏期有不同的影响。嗅觉和视觉事件相关电位分别在主动和被动任务反应条件下在单刺激范式下被诱发。参与者包括来自三个年龄组的30名健康人，包括年轻人、中年人和老年人。结果表明，两种感觉模式的P3事件相关电位潜伏期均随年龄增长而延长。在视觉事件相关电位的不同年龄组中，主动任务和被动任务的P3潜伏期相似，但在嗅觉通道中，老年人在被动任务中的潜伏期明显长于主动任务。未来的方向应该包括利用主动和被动任务条件对特定临床人群进行研究。
Normal aging impairs olfactory functioning both centrally and peripherally. The P3 peak of the event related potential (ERP), evoked by active response to a target stimulus, is considered a reflection of central cognitive processing. It can also be evoked in a passive task to both auditory and visual stimuli. Our goal was to investigate whether age influences amplitude and latency of the ERP differentially in active and passive tasks to olfactory stimuli. Olfactory and visual event-related potentials were elicited with a single-stimulus paradigm in separate active and passive task response conditions. Participants included 30 healthy individuals from three age groups, young, middle age, and older adults. Results indicated that P3 ERP latency increased with age in both sensory modalities. P3 latencies for active versus passive tasks were similar across age groups for visual ERPs, but in the olfactory modality, older adults demonstrated significantly longer latencies in the passive task compared to the active task. Future directions should include research on specific clinical populations utilizing active versus passive task conditions.
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