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dc.creatorSalzman T.
dc.creatorAboualmagd A.
dc.creatorBadawi H.
dc.creatorTobón-Vallejo D.
dc.creatorKim H.
dc.creatorDahroug L.
dc.creatorLaamarti F.
dc.creatorEl Saddik A.
dc.creatorFraser S.
dc.descriptionExecutive function and motor control deficits adversely affect gait performance with age, but the neural correlates underlying this interaction during stair climbing remains unclear. Twenty older adults (72.7 ± 6.9 years) completed single tasks: standing and responding to a response time task (SC), ascending or descending stairs (SMup, SMdown); and a dual-task: responding while ascending or descending stairs (DTup, DTdown). Prefrontal hemodynamic response changes (∆HbO2, ∆HbR) were examined using functional near-infrared spectroscopy (fNIRS), gait speed was measured using in-shoe smart insoles, and vocal response time and accuracy were recorded. Findings revealed increased ∆HbO2 (p = 0.020) and slower response times (p < 0.001) during dual-versus single tasks. ∆HbR (p = 0.549), accuracy (p = 0.135) and gait speed (p = 0.475) were not significantly different between tasks or stair climbing conditions. ∆HbO2 and response time findings suggest that executive processes are less efficient during dual-tasks. These findings, in addition to gait speed and accuracy maintenance, may provide insights into the neural changes that precede performance declines. To capture the subtle differences between stair ascent and descent and extend our understanding of the neural correlates of stair climbing in older adults, future studies should examine more difficult cognitive tasks. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
dc.publisherMDPI AG
dc.sourceBrain Sciences
dc.subjectCognitive agingspa
dc.subjectCognitive functionspa
dc.subjectExecutive functionspa
dc.subjectFunctional near-infrared spectroscopy (fNIRS)spa
dc.subjectOlder adultspa
dc.subjectPrefrontal cortex (PFC)spa
dc.subjectStair climbingspa
dc.titlePrefrontal cortex involvement during dual-task stair climbing in healthy older adults: An fNIRS study
dc.publisher.programIngeniería de Sistemasspa
dc.subject.keywordcognitive agingeng
dc.subject.keywordcontrolled studyeng
dc.subject.keywordexecutive functioneng
dc.subject.keywordfunctional near-infrared spectroscopyeng
dc.subject.keywordhuman experimenteng
dc.subject.keywordprefrontal cortexeng
dc.subject.keywordreaction timeeng
dc.subject.keywordstair climbingeng
dc.subject.keywordwalking speedeng
dc.publisher.facultyFacultad de Ingenieríasspa
dc.affiliationSalzman, T., School of Human Kinetics, Faculty of Health Science, University of Ottawa, Ottawa, ON K1N 7K4, Canada
dc.affiliationAboualmagd, A., Interdisciplinary School of Health Sciences, Faculty of Health Science, University of Ottawa, Ottawa, ON K1N 7K4, Canada
dc.affiliationBadawi, H., Multimedia Communications Research Laboratory (MCRLab), School of Electrical Engineering and Computer Science, University of Ottawa, Ottawa, ON K1N 7K4, Canada
dc.affiliationTobón-Vallejo, D., Electronics and Telecommunications Engineering Department, Universidad de Medellín, Medellín, 050030, Colombia
dc.affiliationKim, H., School of Human Kinetics, Faculty of Health Science, University of Ottawa, Ottawa, ON K1N 7K4, Canada
dc.affiliationDahroug, L., Interdisciplinary School of Health Sciences, Faculty of Health Science, University of Ottawa, Ottawa, ON K1N 7K4, Canada
dc.affiliationLaamarti, F., Multimedia Communications Research Laboratory (MCRLab), School of Electrical Engineering and Computer Science, University of Ottawa, Ottawa, ON K1N 7K4, Canada
dc.affiliationEl Saddik, A., Multimedia Communications Research Laboratory (MCRLab), School of Electrical Engineering and Computer Science, University of Ottawa, Ottawa, ON K1N 7K4, Canada
dc.affiliationFraser, S., Interdisciplinary School of Health Sciences, Faculty of Health Science, University of Ottawa, Ottawa, ON K1N 7K4, Canada
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