Relationship between neural functional connectivity and memory performance in age-related macular degeneration

Xintong Zuo, Jie Zhuang, Nan kuei Chen, Scott Cousins, Priscila Cunha, Eleonora M. Lad, David J. Madden, Guy Potter, Heather E. Whitson

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Age-related macular degeneration (AMD) has been linked to memory deficits, with no established neural mechanisms. We collected resting-state brain functional magnetic resonance imaging and standardized verbal recall tests from 42 older adults with AMD and 41 age-matched controls. We used seed-based whole brain analysis to quantify the strength of functional connectivity between hubs of the default mode network and a network of medial temporal regions relevant for memory. Our results indicated neither memory performance nor network connectivity differed by AMD status. However, the AMD participants exhibited stronger relationships than the controls between memory performance and connectivity from the memory network hub (left parahippocampal) to 2 other regions: the left temporal pole and the right superior/middle frontal gyri. Also, the connectivity between the medial prefrontal cortex and posterior cingulate cortex of default mode network correlated more strongly with memory performance in AMD compared to control. We concluded that stronger brain-behavior correlation in AMD may suggest a role for region-specific connectivity in supporting memory in the context of AMD.

Original languageEnglish (US)
Pages (from-to)176-185
Number of pages10
JournalNeurobiology of Aging
Volume95
DOIs
StatePublished - Nov 2020
Externally publishedYes

Keywords

  • AMD
  • DMN
  • Episodic memory
  • LPHC
  • Older adults
  • Visual impairment

ASJC Scopus subject areas

  • Neuroscience(all)
  • Aging
  • Developmental Biology
  • Clinical Neurology
  • Geriatrics and Gerontology

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