Author ORCID Identifier
https://orcid.org/0000-0003-0769-4167
Date of Award
8-11-2020
Degree Type
Thesis
Degree Name
Master of Arts (MA)
Department
Psychology
First Advisor
Vonetta Dotson, Ph.D.
Second Advisor
Keith McGregor, Ph.D.
Third Advisor
Sarah Barber, Ph.D.
Fourth Advisor
Joe Nocera, Ph.D.
Abstract
Depressive symptoms are common in older adults. Previous studies have shown that aerobic exercise is effective in treating depression and improves brain function. The goal of the current study was to determine the interrelationships between aerobic exercise, default mode network (DMN) functional connectivity, and depressive symptoms in thirty-eight healthy older adults. Results showed that (a) increased connectivity within the DMN and to the sgACC is associated with greater depressive symptoms at baseline, (b) decreases in functional connectivity within the DMN after a 12 week exercise intervention were greater for participants in the aerobic group relative to the control group, and (c) there is a positive association between changes in DMN functional connectivity and changes in depressive symptoms, but a negative association between other regions of the brain. These findings suggest that changes in resting-state functional connectivity are associated with changes in depressive symptoms in older adults with subthreshold depressive symptoms.
DOI
https://doi.org/10.57709/18558268
Recommended Citation
Gradone, Andrew, "Default Mode Functional Connectivity, Aerobic Exercise, and Depressive Symptoms: A Resting-State fMRI Study." Thesis, Georgia State University, 2020.
doi: https://doi.org/10.57709/18558268
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