1. Brain activation during dual-task processing is associated with cardiorespiratory fitness and performance in older adults
- Author
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Chelsea N Wong, Laura eChaddock-Heyman, Michelle W Voss, Agnieszka Z Burzynska, Chandramallika eBasak, Kirk I Erickson, Ruchika Shaurya Prakash, Amanda eSzabo-Reed, Siobhan M Phillips, Thomas eWojcicki, Emily L Mailey, Edward eMcAuley, and Arthur F Kramer
- Subjects
Aging ,Executive Function ,Exercise ,fMRI ,dual-task ,cardiorespiratory fitness ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Higher cardiorespiratory fitness is associated with better cognitive performance and enhanced brain activation. Yet, the extent to which cardiorespiratory fitness-related brain activation is associated with better cognitive performance is not well understood. In this cross-sectional study, we examined whether the association between cardiorespiratory fitness and executive function was mediated by greater prefrontal cortex activation in healthy older adults. Brain activation was measured during dual-task performance with functional magnetic resonance imaging in a sample of 128 healthy older adults (59-80 years). Higher cardiorespiratory fitness was associated with greater activation during dual-task processing in several brain areas including the anterior cingulate and supplementary motor cortex (ACC/SMA), thalamus and basal ganglia, right motor/somatosensory cortex and middle frontal gyrus, and left somatosensory cortex, controlling for age, sex, education, and gray matter volume. Of these regions, greater ACC/SMA activation mediated the association between cardiorespiratory fitness and dual-task performance. We provide novel evidence that cardiorespiratory fitness may support cognitive performance by facilitating brain activation in a core region critical for executive function.
- Published
- 2015
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