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| Research article summary (published 27 Feb 2002): |
Aging effects on memory encoding in the frontal lobes.
Full Abstract
Functional magnetic resonance imaging (fMRI) was used to compare frontal-lobe activation in younger and older adults during encoding of words into memory. Participants made semantic or nonsemantic judgments about words. Younger adults exhibited greater activation for semantic relative to nonsemantic judgments in several regions, with the largest activation in the left inferior frontal gyrus. Older adults exhibited greater activation for semantic judgments in the same regions. but the extent of activation was reduced in left prefrontal regions. In older adults, there was a significant association between behavioral tests of declarative and working memory and extent of frontal activation. These results suggest that age-associated decreases in memory ability may be due to decreased frontal-lobe contributions to the initial encoding of experience.
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Author information
Author/s: Stebbins, Glenn T (GT); Carrillo, Maria C (MC); Dorfman, Jennifer (J); Dirksen, Courtney (C); Desmond, John E (JE); Turner, David A (DA); Bennett, David A (DA); Wilson, Robert S (RS); Glover, Gary (G); Gabrieli, John D E (JD);
Affiliation: Department of Neurological Sciences, Rush University and Rush-Presbyterian-St Luke's Medical Center, Chicago, Illinois 60612, USA. gstebbin(-atsign-)rush.edu
Grants: AG 12995 (Agency:United States NIA) ; P01-09466 (Agency:United States PHS)
Journal and publication information
Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S.
Journal: Psychology and aging (Psychol Aging), published in United States. (Language: eng)
Reference: 2002-Mar; vol 17 (issue 1) : pp 44-55
Dates: Created 2002/04/04; Completed 2002/10/16; Revised 2007/11/14;
PMID: 11933895, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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