Greater orbital prefrontal volume selectively predicts worse working memory performance in older adults

David H. Salat, Jeffrey A. Kaye, Jeri S. Janowsky

Research output: Contribution to journalArticle

89 Scopus citations

Abstract

Alterations of the prefrontal cortex (PFC) could contribute to cognitive decline in older adults. We examined the specificity of age-related PFC degeneration and whether cognitive abilities were related to volumetric measurements. Older and younger subjects were tested using a battery of tasks supported by different subregions within the PFC. The cognitive data from older subjects were related to PFC volumetric measurements in order to determine whether cortical morphology was predictive of individual differences in task performance within this age range (72-94 years). Working memory performance best distinguished older from younger subjects. Working memory measures but not other measures were correlated with age in both groups. A larger orbital PFC volume was related to a worse working memory performance and a larger superior PFC volume was related to worse conditional association learning. The volumes of these regions were not related to performance on other tasks. These results suggest that working memory is a sensitive measure of cognitive aging and that regional morphology is associated with specific cognitive abilities in older adults.

Original languageEnglish (US)
Pages (from-to)494-505
Number of pages12
JournalCerebral Cortex
Volume12
Issue number5
DOIs
StatePublished - 2002

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Cellular and Molecular Neuroscience

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