The overarching goal of this project is to identify the cognitive mechanisms and neural structures that underlie the decline in executive functioning observed in aging. Several research groups, including ours, have documented age-associated decline in executive functioning and its significant impact on daily functioning. The underlying causes of this decline remain unclear, however;a clearer understanding of how various cognitive and neural changes interact to produce executive decline is needed. We propose an overarching model in which age-associated frontal atrophy, frontal hypoperfusion, and loss of white matter integrity interact to affect information processing speed and executive function. We propose to prospectively study 150 normal elderly with structural neuroimaging, perfusion, and cognitive measures at baseline and again after 36 months. We have three specific aims: 1) test the relationships between age, frontal lobe structure, frontal perfusion, white matter, and cognition cross-sectionally;2) identify potential health and lifestyle predictors of MRI and cognitive outcomes;and 3) test the relationships between longitudinal change in MRI and longitudinal changes in cognition. This project takes advantage of newly developed techniques of high field, high resolution MRI and cognitive psychology methods of measuring processing speed and executive functioning. We are particularly focusing on white matter integrity because it may be influenced by lifestyle and health issues that are potentially treatable.

Public Health Relevance

This project will study how interrelated neurological and cognitive changes associated with normal aging impact functional abilities and quality of life. The potential contribution to public health lies in the fact that some of these age-related changes might be influenced by improvements in physical health and lifestyle choices.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Research Project (R01)
Project #
5R01AG032289-04
Application #
8288767
Study Section
Cognition and Perception Study Section (CP)
Program Officer
King, Jonathan W
Project Start
2009-06-15
Project End
2014-05-31
Budget Start
2012-06-01
Budget End
2013-05-31
Support Year
4
Fiscal Year
2012
Total Cost
$544,617
Indirect Cost
$111,015
Name
University of California San Francisco
Department
Neurology
Type
Schools of Medicine
DUNS #
094878337
City
San Francisco
State
CA
Country
United States
Zip Code
94143
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