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首页> 外文期刊>Journal of clinical and experimental neuropsychology >Registering eye movements during reading in Alzheimers disease: Difficulties in predicting upcoming words
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Registering eye movements during reading in Alzheimers disease: Difficulties in predicting upcoming words

机译：阅读期间在阿尔茨海默氏病中记录眼球运动：预测即将到来的单词时的困难

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摘要

Reading requires the fine integration of attention, ocular movements, word identification, and language comprehension, among other cognitive parameters. Several of the associated cognitive processes such as working memory and semantic memory are known to be impaired by Alzheimers disease (AD). This study analyzes eye movement behavior of 18 patients with probable AD and 40 age-matched controls during Spanish sentence reading. Controls focused mainly on word properties and considered syntactic and semantic structures. At the same time, controls knowledge and prediction about sentence meaning and grammatical structure are quite evident when we consider some aspects of visual exploration, such as word skipping, and forward saccades. By contrast, in the AD group, the predictability effect of the upcoming word was absent, visual exploration was less focused, fixations were much longer, and outgoing saccade amplitudes were smaller than those in controls. The altered visual exploration and the absence of a contextual predictability effect might be related to impairments in working memory and long-term memory retrieval functions. These eye movement measures demonstrate considerable sensitivity with respect to evaluating cognitive processes in Alzheimers disease. They could provide a user-friendly marker of early disease symptoms and of its posterior progression.
机译：阅读需要注意力，眼动，单词识别和语言理解以及其他认知参数的完美结合。已知一些相关的认知过程（例如工作记忆和语义记忆）会受到阿尔茨海默氏病（AD）的损害。这项研究分析了18位可能患有AD的患者和40位年龄相匹配的对照组在西班牙句子阅读期间的眼球运动行为。控制主要集中在单词属性上，并考虑了句法和语义结构。同时，当我们考虑视觉探索的某些方面（例如跳词和前扫视）时，关于句子含义和语法结构的控制知识和预测非常明显。相比之下，在AD组中，缺少即将到来的单词的可预测性效果，视觉探索的重点更少，注视时间更长，并且扫视幅度比对照组小。视觉探索的改变和上下文的可预测性效应的缺失可能与工作记忆和长期记忆检索功能受损有关。这些眼动措施显示出对评估阿尔茨海默氏病认知过程的敏感性。它们可以提供疾病早期症状及其后发展的用户友好标记。

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