Document Detail


The effect of exercise on the cerebral vasculature of healthy aged subjects as visualized by MR angiography.
MedLine Citation:
PMID:  19589885     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND AND PURPOSE: Prior studies suggest that aerobic exercise may reduce both the brain atrophy and the decline in fractional anisotropy observed with advancing age. It is reasonable to hypothesize that exercise-induced changes to the vasculature may underlie these anatomic differences. The purpose of this blinded study was to compare high-activity and low-activity healthy elderly volunteers for differences in the cerebrovasculature as calculated from vessels extracted from noninvasive MR angiograms (MRAs). MATERIALS AND METHODS: Fourteen healthy elderly subjects underwent MRA. Seven subjects reported a high level of aerobic activity (64 +/- 5 years of age; 5 men, 2 women) and 7, a low activity level (68 +/- 6 years of age; 5 women, 2 men). Following vessel segmentation from MRA by an individual blinded to subject activity level, quantitative measures of vessel number, radius, and tortuosity were calculated and histogram analysis of vessel number and radius was performed. RESULTS: Aerobically active subjects exhibited statistically significant reductions in vessel tortuosity and an increased number of small vessels compared with less active subjects. CONCLUSIONS: Aerobic activity in elderly subjects is associated with lower vessel tortuosity values and an increase in the number of small-caliber vessels. It is possible that an aerobic exercise program may contribute to healthy brain aging. MRA offers a noninvasive approach to visualizing the cerebral vasculature and may prove useful in future longitudinal investigations.
Authors:
E Bullitt; F N Rahman; J K Smith; E Kim; D Zeng; L M Katz; B L Marks
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2009-07-09
Journal Detail:
Title:  AJNR. American journal of neuroradiology     Volume:  30     ISSN:  1936-959X     ISO Abbreviation:  AJNR Am J Neuroradiol     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-11-16     Completed Date:  2010-02-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8003708     Medline TA:  AJNR Am J Neuroradiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1857-63     Citation Subset:  IM    
Affiliation:
Department of Surgery, University of North Carolina, Chapel Hill, NC, USA. bullitt@med.unc.edu
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MeSH Terms
Descriptor/Qualifier:
Aged
Aged, 80 and over
Aging / physiology*
Atrophy
Brain / blood supply,  pathology
Cerebral Angiography*
Cerebral Arteries / pathology
Cerebrovascular Circulation / physiology*
Exercise*
Female
Humans
Magnetic Resonance Angiography*
Male
Microcirculation / physiology
Middle Aged
Grant Support
ID/Acronym/Agency:
R01EB000219/EB/NIBIB NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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