Influence of a visuo-spatial, verbal and central executive working memory task on postural control

In this study, participants were required to perform different working memory (WM) tasks (a verbal task, a visuo-spatial task with two levels of difficulty and a central executive task) under different challenges to postural control (sitting, shoulder width stance and tandem stance). When a WM task...

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Bibliographic Details
Published in:Gait & posture 2001-10, Vol.14 (2), p.110-116
Main Authors: Dault, Mylène C, Frank, James S, Allard, Fran
Format: Article
Language:English
Subjects:
Adult
Attention
Centre of pressure
Female
Humans
Language
Male
Memory - physiology
Postural control
Posture
Space Perception
Task Performance and Analysis
Visual Perception
Working memory
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Summary:In this study, participants were required to perform different working memory (WM) tasks (a verbal task, a visuo-spatial task with two levels of difficulty and a central executive task) under different challenges to postural control (sitting, shoulder width stance and tandem stance). When a WM task was added, changes in postural sway were characterized by an increase in frequency and decrease in amplitude of sway indicating a tighter control. We found no changes in postural control between the different types of WM tasks, which might support a general capacity limitation hypothesis. However, no changes were found in performance of the WM when postural stance was modified and no changes were found in postural sway, when the difficulty level of the visuo-spatial task was modified. Consequently, the results seem to indicate that the addition of a WM task, regardless of task type or task difficulty, forces the central nervous system to choose a tighter control strategy.
ISSN:0966-6362
1879-2219
DOI:10.1016/S0966-6362(01)00113-8