A-9 Examining Neural Variability during Dual-Task Walking and Cortical Thickness in Older Adults
نویسندگان
چکیده
Abstract Objective Greater intraindividual variability (IIV) in behavioral and cognitive performance is a risk factor for adverse outcomes but research concerning IIV neural signal scarce. Using functional near-infrared spectroscopy (fNIRS), we showed that oxygenated hemoglobin (HbO2) levels the prefrontal cortex increased from single task (Single-Task-Walk–STW; Single-Task-Alpha–STA) to Dual-Task-Walk (DTW) conditions older adults. Herein, predicted that, consistent with inefficiency hypothesis, reduced cortical thickness would be associated greater increases fNIRS-derived HbO2 tasks DTW when adjusting performance. Method Participants were right-handed adults without dementia recruited community (N = 55; M(SD) age 74.84(4.97); %female 49.1). Neuroimaging included fNIRS during MRI thickness. was operationalized using SD of observations assessed 30-s interval each experimental condition. Results Moderation analyses, through linear mixed effects models, revealed several frontal (p < 0.02), parietal temporal 0.01), occipital 0.01) regions, thinner DTW. Conclusion Reduced inefficient dual-task walking. Worse gait under predicts mobility outcomes. worse are possible brain mechanisms explain developing impairments aging disease populations.
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ژورنال
عنوان ژورنال: Archives of Clinical Neuropsychology
سال: 2021
ISSN: ['1873-5843', '0887-6177']
DOI: https://doi.org/10.1093/arclin/acab062.27