Reducing postural sway by concurrently performing challenging cognitive tasks |
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| Affiliation: | 1. Department of Clinical Neurosciences, Division of Neurology, Geneva University Hospitals, Geneva University, Geneva, Switzerland;2. Willy Taillard Laboratory of Kinesiology, Geneva University Hospitals, Geneva University, Switzerland;3. Division of Geriatrics, Department of Internal Medicine, Rehabilitation and Geriatrics, Geneva University Hospitals, Geneva University, Geneva, Switzerland;4. Department of Genetic and Laboratory Medicine, Division of Laboratory Medicine, Geneva University Hospitals, Geneva, Switzerland;5. Department of Neurology, Albert Einstein College of Medicine, Yeshiva University, USA |
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| Abstract: | The present experiment varied cognitive complexity and sensory modality on postural control in young adults. Seventeen participants (23.71 ± 1.99 years) were instructed to stand feet together on a force platform while concurrently performing cognitive tasks of varying degrees of difficulty (easy, moderate and difficult). The cognitive tasks were presented both, auditorily and visually. Auditory tasks consisted of counting the occurrence of one or two letters and repeating a string of words. Visual tasks consisted of counting the occurrence of one or two numbers. With increasing cognitive demand, area of 95% confidence ellipse and ML sway variability was significantly reduced. The visual tasks reduced ML sway variability, whereas the auditory tasks increased COP irregularity. We suggest that these findings are primarily due to an increase in sensorimotor integration as a result of a shift in attentional focus. |
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| Keywords: | Postural control Cognitive demand Dual-task Sensory modality |
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