Reaction time variability and brain white matter integrity.
نویسندگان
چکیده
منابع مشابه
White matter integrity and reaction time intraindividual variability in healthy aging and early-stage Alzheimer disease.
Aging and early-stage Alzheimer disease (AD) have been shown to be associated with increased RT intraindividual variability (IIV, as reflected by the coefficient of variation) and an exaggeration of the slow tail of the reaction time (RT) distribution in attentional control tasks, based on ex-Gaussian analyses. The current study examined associations between white matter volume, IIV, and ex-Gau...
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Cognitive development is known to involve improvements in accuracy, capacity, and processing speed. Less is known about the role of performance consistency, and there has been virtually no empirical examination of the neural underpinnings of within-person variability in development. In a sample of 92 healthy children and adolescents aged 8-19 years, we aimed to characterize age-related changes ...
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The intraindividual variability (IIV) of cognitive performance has been shown to increase with aging. While brain research has generally focused on mean performance, little is known about neural correlates of cognitive IIV. Nevertheless, some studies suggest that IIV relates more strongly than mean level of performance to the quality of white matter (WM). Our study aims to explore the relation ...
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Decline in cognitive performance in old age is linked to both suboptimal neural processing in grey matter (GM) and reduced integrity of white matter (WM), but the whole-brain structure-function-cognition associations remain poorly understood. Here we apply a novel measure of GM processing-moment-to-moment variability in the blood oxygenation level-dependent signal (SDBOLD)-to study the associat...
متن کاملWhite Matter Integrity And Age Related Differences In Reaction Time Components
WHITE MATTER INTEGRITY AND AGE RELATEDDIFFERENCES IN REACTION TIME COMPONENTSbyYIQIN YANGDecember 2013Advisor: Dr. Naftali RazMajor: PsychologyDegree: Doctor of PhilosophyReduced speed in information processing is a well-documented phenomenon associatedwith advanced aging. Age-related deterioration in white matter integrity might play a role in age-relate...
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ژورنال
عنوان ژورنال: Neuropsychology
سال: 2019
ISSN: 1931-1559,0894-4105
DOI: 10.1037/neu0000483