Ryan Jennifer D, Wynn Jordana S, Shen Kelly, Liu Zhong-Xu
Rotman Research Institute at Baycrest Health Sciences, Toronto, ON, Canada.
Departments of Psychology, Psychiatry, University of Toronto, Toronto, ON, Canada.
Neuropsychol Dev Cogn B Aging Neuropsychol Cogn. 2022 May;29(3):418-442. doi: 10.1080/13825585.2021.2007841. Epub 2021 Dec 2.
The use of multi-modal approaches, particularly in conjunction with multivariate analytic techniques, can enrich models of cognition, brain function, and how they change with age. Recently, multivariate approaches have been applied to the study of eye movements in a manner akin to that of neural activity (i.e., ). Here, we review the literature regarding multi-modal and/or multivariate approaches, with specific reference to the use of eyetracking to characterize age-related changes in memory. By applying multi-modal and multivariate approaches to the study of aging, research has shown that aging is characterized by moment-to-moment alterations in the amount and pattern of visual exploration, and by extension, alterations in the activity and function of the hippocampus and broader medial temporal lobe (MTL). These methodological advances suggest that age-related declines in the integrity of the memory system has consequences for oculomotor behavior in the moment, in a reciprocal fashion. Age-related changes in hippocampal and MTL structure and function may lead to an increase in, and change in the patterns of, visual exploration in an effort to upregulate the encoding of information. However, such visual exploration patterns may be non-optimal and actually reduce the amount and/or type of incoming information that is bound into a lasting memory representation. This research indicates that age-related cognitive impairments are considerably broader in scope than previously realized.
多模态方法的应用,尤其是与多变量分析技术相结合时,可以丰富认知模型、脑功能模型以及它们如何随年龄变化的模型。最近,多变量方法已被应用于眼动研究,其方式类似于神经活动(即 )。在此,我们回顾关于多模态和/或多变量方法的文献,特别提及使用眼动追踪来表征与年龄相关的记忆变化。通过将多模态和多变量方法应用于衰老研究,研究表明衰老的特征在于视觉探索的数量和模式的逐时变化,进而在于海马体和更广泛的内侧颞叶(MTL)的活动和功能的变化。这些方法学进展表明,与年龄相关的记忆系统完整性下降会即时对眼球运动行为产生相互影响。海马体和MTL结构与功能的年龄相关变化可能导致视觉探索增加以及模式改变,以努力上调信息编码。然而,这种视觉探索模式可能并非最优,实际上会减少被整合到持久记忆表征中的传入信息的数量和/或类型。这项研究表明,与年龄相关的认知障碍在范围上比以前意识到的要广泛得多。
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