Decreased resting-state brain function in older adults predicts enlarged representational momentum.

IF 3.7 1区心理学 Q1 GERONTOLOGY Psychology and Aging Pub Date : 2024-11-01 Epub Date: 2024-07-29 DOI:10.1037/pag0000832

Xiaokang Jin, Juntao Chen, Shizhen Yan, Ziping Liang, Ziliang Zhu, Shilin Wei, Hua Jin, Hengyi Rao

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Abstract

Representational momentum (RM) refers to the phenomenon in which an observer's judgment of the final location of a previously viewed moving target is often displaced forward in the direction of motion. This phenomenon is an adaptive mechanism that compensates for neural processing delays and is closely associated with visual cortex function. However, the impact of age-related decline of visual cortex function on the manifestations of RM remains unclear. The present study examined differences in the RM effect between older (N = 82) and younger adults (N = 74) using a cursor-positioning task. Additionally, resting-state functional magnetic resonance imaging was used to explore the potential neural substrates that underlie these differences, employing amplitude of low-frequency fluctuation (ALFF, reflecting the intensity of neural activity) and regional homogeneity (ReHo, reflecting the synchronization of neural activity) as indicators. Our findings indicate a significant increase in RM among older adults compared with younger adults. Neuroimaging data revealed a significant decrease in ALFF and ReHo within extensive regions of the visual cortex in older adults, validating age-related differences in this cortical area. More importantly, ALFF values in the bilateral visual area 3 and ReHo values in the bilateral visual area 2 in older adults exhibited a strong negative correlation with their RM effects. These results suggest that larger RM in older adults may be functional compensation for aging of the visual cortex. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

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老年人大脑静息状态功能的降低预示着表象动量的扩大。

表象动量（Representational momentum，RM）是指观察者对先前观察到的运动目标的最终位置的判断往往会沿着运动方向前移的现象。这种现象是一种补偿神经处理延迟的适应机制，与视觉皮层功能密切相关。然而，与年龄相关的视觉皮层功能衰退对RM表现的影响仍不清楚。本研究使用光标定位任务研究了老年人（82 人）和年轻人（74 人）之间 RM 效应的差异。此外，本研究还使用静息态功能磁共振成像来探索导致这些差异的潜在神经基质，并采用低频波动幅度（ALFF，反映神经活动的强度）和区域同质性（ReHo，反映神经活动的同步性）作为指标。我们的研究结果表明，与年轻人相比，老年人的 RM 明显增加。神经影像学数据显示，在老年人视觉皮层的广泛区域内，ALFF 和 ReHo 显著下降，验证了这一皮层区域与年龄相关的差异。更重要的是，老年人双侧视觉区域 3 的 ALFF 值和双侧视觉区域 2 的 ReHo 值与其 RM 效应呈强烈的负相关。这些结果表明，老年人较大的RM可能是视觉皮层老化的功能补偿。(PsycInfo Database Record (c) 2024 APA, 版权所有）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Psychology and Aging Multiple-

CiteScore

6.40

自引率

10.80%

发文量

期刊介绍： Psychology and Aging publishes original articles on adult development and aging. Such original articles include reports of research that may be applied, biobehavioral, clinical, educational, experimental (laboratory, field, or naturalistic studies), methodological, or psychosocial. Although the emphasis is on original research investigations, occasional theoretical analyses of research issues, practical clinical problems, or policy may appear, as well as critical reviews of a content area in adult development and aging. Clinical case studies that have theoretical significance are also appropriate. Brief reports are acceptable with the author"s agreement not to submit a full report to another journal.