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Neural correlates of the interactive relationship between memory deficits and depressive symptoms in nondemented elderly: resting fMRI study. Behav Brain Res 2011 Jun 01;219(2):205-12

Date

01/18/2011

Pubmed ID

21238490

Pubmed Central ID

PMC3062733

DOI

10.1016/j.bbr.2011.01.008

Scopus ID

2-s2.0-79952698035   43 Citations

Abstract

Prospective studies have shown an association between depressive symptoms and cognitive impairment among older adults. However, the neural correlates of this relationship are poorly understood. Our aim was to examine whether interactive effects of memory deficits and depressive symptoms are present in the memory-associated functional networks, in nondemented elderly subjects. Fifteen subjects with amnestic mild cognitive impairment (aMCI) and 20 age-matched normal (CN) elderly subjects participated in this cross-sectional study. Resting-state functional connectivity MRI (R-fMRI) measured the hippocampal functional connectivity (HFC) alterations between the two groups. Voxelwise linear regression analysis was performed to correlate hippocampal network strength with the Rey Auditory Verbal Learning Test delayed recall and the Geriatric Depression Scale scores, after adjusting for age and group effects. Poorer memory performance was associated with decreased positively correlated HFC connectivity in the specific frontal lobe and default mode network (DMN) structures. Poorer memory performance also was associated with decreased anticorrelated HFC connectivity in the bilateral inferior parietal and right dorsolateral prefrontal cortices. In contrast, greater depressive symptom severity was associated with increased HFC connectivity in several frontal lobes and DMN regions. Depressive symptoms and memory functions had interactive effects on the HFC, in the frontal, temporal, and PCC structures. Our findings suggest that the R-fMRI technique can be used to examine the changes in functional neural networks where memory deficits and depressive symptoms coexist in the geriatric population.

Author List

Goveas J, Xie C, Wu Z, Douglas Ward B, Li W, Franczak MB, Jones JL, Antuono PG, Yang Z, Li SJ

Authors

Piero G. Antuono MD Professor in the Neurology department at Medical College of Wisconsin
Malgorzata Franczak MD Professor in the Neurology department at Medical College of Wisconsin
Joseph S. Goveas MD Professor in the Psychiatry department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Aged
Cognition Disorders
Cross-Sectional Studies
Data Interpretation, Statistical
Depressive Disorder
Female
Hippocampus
Humans
Interpersonal Relations
Magnetic Resonance Imaging
Male
Memory Disorders
Nerve Net
Neuropsychological Tests
Oxygen
Prospective Studies
Psychiatric Status Rating Scales