Pre-attentive Visual Processing in Alzheimer’s Disease: An Event-related Potential Study

P3b页 第3A页 怪胎范式 事件相关电位 听力学 心理学 神经心理学 刺激(心理学) 视觉处理 认知 认知心理学 发展心理学 神经科学 脑电图 医学 感知
作者
Eunchan Na,Kang-Hee Lee,Eun‐jin Kim,Jong Bin Bae,Seung Wan Suh,Seonjeong Byun,Ji Won Han,Ki Woong Kim
出处
期刊:Current Alzheimer Research [Bentham Science Publishers]
卷期号:17 (13): 1195-1207 被引量:4
标识
DOI:10.2174/1567205018666210216084534
摘要

Introduction: While identifying Alzheimer’s Disease (AD) in its early stages is crucial, traditional neuropsychological tests tend to lack sensitivity and specificity for its diagnosis. Neuropsychological studies have reported visual processing deficits of AD, and event-related potentials (ERPs) are suitable to investigate pre-attentive processing with superior temporal resolution. Objective: This study aimed to investigate visual attentional characteristics of adults with AD, from pre-attentive to attentive processing, using a visual oddball task and ERPs. Methods: Cognitively normal elderly controls (CN) and patients with probable AD (AD) were recruited. Participants performed a three-stimulus visual oddball task and were asked to press a designated button in response to the target stimuli. The amplitudes of 4 ERPs were analyzed. Mismatchnegativity (vMMN) was analyzed around the parieto-occipital and temporo-occipital regions. P3a was analyzed around the fronto-central regions, whereas P3b was analyzed around the centro-parietal regions. Results: Late vMMN amplitudes of the AD group were significantly smaller than those of the CN group, while early vMMN amplitudes were comparable. Compared to the CN group, P3a amplitudes of the AD group were significantly smaller for the infrequent deviant stimuli, but the amplitudes for the standard stimuli were comparable. Lastly, the AD group had significantly smaller P3b amplitudes for the target stimuli compared to the CN group. Conclusion: Our findings imply that AD patients exhibit pre-attentive visual processing deficits, known to affect later higher-order brain functions. In a clinical setting, the visual oddball paradigm could be used to provide helpful diagnostic information since pre-attentive ERPs can be induced by passive exposure to infrequent stimuli.
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