期刊
FRONTIERS IN HUMAN NEUROSCIENCE
卷 4, 期 -, 页码 -出版社
FRONTIERS RES FOUND
DOI: 10.3389/neuro.09.010.2010
关键词
aging; processing speed; cerebellum; cerebral small vessel disease; structural covariance
资金
- National Institute on Deafness and other Communication Disorders [P50 DC00422]
- National Center for Research Resources [C06 RR14516]
- American Federation for Aging
Age-related declines in processing speed are hypothesized to underlie the widespread changes in cognition experienced by older adults. We used a structural covariance approach to identify putative neural networks that underlie age-related structural changes associated with processing speed for 42 adults ranging in age from 19 to 79 years. To characterize a potential mechanism by which age-related gray matter changes lead to slower processing speed, we examined the extent to which cerebral small vessel disease influenced the association between age-related gray matter changes and processing speed. A frontal pattern of gray matter and white matter variation that was related to cerebral small vessel disease, as well as a cerebellar pattern of gray matter and white matter variation were uniquely related to age-related declines in processing speed. These results demonstrate that at least two distinct factors affect age-related changes in processing speed, which might be slowed by mitigating cerebral small vessel disease and factors affecting declines in cerebellar morphology.
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