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An fMRI investigation of working memory and its relationship with cardiorespiratory fitness in pediatric posterior fossa tumor survivors who received cranial radiation therapy
Author(s) -
Wolfe Kelly R.,
MadanSwain Avi,
Hunter Gary R.,
Reddy Alyssa T.,
Baños James,
Kana Rajesh K.
Publication year - 2013
Publication title -
pediatric blood and cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.116
H-Index - 105
eISSN - 1545-5017
pISSN - 1545-5009
DOI - 10.1002/pbc.24331
Subject(s) - cardiorespiratory fitness , medicine , working memory , aerobic exercise , neuroimaging , brain tumor , physical medicine and rehabilitation , cognition , physical therapy , psychiatry
Background The present study investigated the relationship between cardiorespiratory fitness and executive functioning in pediatric brain tumor survivors who received cranial radiation. This population is known to show executive dysfunction and lower rates of aerobic exercise compared to peers. Procedure Nine adolescent survivors of pediatric posterior fossa tumor completed an n‐back working memory task during a functional MRI scan, as well as cardiorespiratory fitness testing on a cycle ergometer. Results Neuroimaging findings indicated typical activation patterns associated with working memory, mainly in the frontal–parietal network. Higher cardiorespiratory fitness was related to better performance on a behavioral measure of working memory and more efficient neural functioning. Conclusions This study provides preliminary evidence that cardiorespiratory fitness may be related to executive functioning, particularly working memory, in pediatric brain tumor survivors. Descriptions of the brain regions recruited for working memory by pediatric brain tumor survivors may be used to inform future interventions or indicators of treatment efficacy. Pediatr Blood Cancer 2013; 60: 669–675. © 2012 Wiley Periodicals, Inc.