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Current Alzheimer Research

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ISSN (Print): 1567-2050
ISSN (Online): 1875-5828

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Research Article

Neural and Retinal Characteristics in Relation to Working Memory in Older Adults with Mild Cognitive Impairment

Author(s): Mabel N.K. Wong, Daniel W.L. Lai, Henry H.-L. Chan and Bess Y.-H. Lam*

Volume 18, Issue 3, 2021

Published on: 23 September, 2021

Page: [185 - 195] Pages: 11

DOI: 10.2174/1567205018666210608114044

Price: $65

Abstract

Objective: This study investigated the relationship between neural activities and retinal structures associated with working memory (WM) in older adults with mild cognitive impairment (MCI).

Methods: Eleven older adults with MCI and 29 healthy controls (60 to 73 years old) were tested. All participants underwent an event-related potential (ERP) recording while performing the two-back memory task. The Optical coherence tomography angiography (OCT-A) was administered to examine the perfusion and vessel density in the retina.

Results: Results showed that WM performance in the MCI group was negatively associated with ERP latencies in central parietal regions (CP6 and CP8) (ps< 0.05). The left nasal vessel and perfusion densities were negatively correlated with the latencies in these two central parietal regions and positively related to WM performance only in the MCI group (ps< 0.05).

Conclusion: The findings on WM, central parietal brain activity, and left nasal vessel and perfusion densities in the retina help us gain a better understanding of the neural and retinal underpinnings of WM in relation to MCI.

Keywords: Mild cognitive impairment, retinal perfusion density, retinal vessel density, working memory, event-related potential, cognition.

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