Longitudinal evidence for diminished frontal cortex function in aging
2010 (English)In: Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, E-ISSN 1091-6490, Vol. 107, no 52, 22682-22686 p.Article in journal (Refereed) Published
Cross-sectional estimates of age-related changes in brain structure and function were compared with 6-y longitudinal estimates. The results indicated increased sensitivity of the longitudinal approach as well as qualitative differences. Critically, the cross-sectional analyses were suggestive of age-related frontal overrecruitment, whereas the longitudinal analyses revealed frontal underrecruitment with advancing age. The cross-sectional observation of overrecruitment reflected a select elderly sample. However, when followed over time, this sample showed reduced frontal recruitment. These findings dispute inferences of true age changes on the basis of age differences, hence challenging some contemporary models of neurocognitive aging, and demonstrate age-related decline in frontal brain volume as well as functional response.
Place, publisher, year, edition, pages
2010. Vol. 107, no 52, 22682-22686 p.
attrition, frontal lobe, multimodal, reorganization
IdentifiersURN: urn:nbn:se:umu:diva-38932DOI: 10.1073/pnas.1012651108ISI: 000285684200062PubMedID: 21156826OAI: oai:DiVA.org:umu-38932DiVA: diva2:385191