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Attentional Demands of Postural Control in Chronic Ankle Instability, Copers and Healthy Controls: A Controlled Cross-Sectional Study Publisher Pubmed



Mohamadi S1 ; Ebrahimi I2 ; Salavati M3 ; Dadgoo M1 ; Jafarpisheh AS4 ; Rezaeian ZS5
Authors
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Authors Affiliations
  1. 1. Department of Physiotherapy, Iran University of Medical Sciences, Tehran, 13487-15459, Iran
  2. 2. Department of Physiotherapy, Iran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Physiotherapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
  4. 4. Department of Ergonomics, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
  5. 5. Department of Physiotherapy, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Gait and Posture Published:2020


Abstract

Background: It has been shown that cognitive loading affects postural control in different populations. However, there is limited and conflicting information about dual task challenges on postural control in chronic ankle instability (CAI). Research Question: Does cognitive task performance change standing postural control in individuals with CAI, copers and healthy subjects? Methods: A descriptive, analytic, and controlled cross-sectional study was conducted on 75 individuals. They were assigned into three matched groups, including CAI, copers, and healthy controls. Postural control variables were collected during single leg standing on a force plate with and without vision and cognition. Parameters of center of pressure (COP), including mean COP area, range, sway index and velocity, were measured. Additionally, cognitive task performance by auditory stroop was assessed by calculating the reaction time and error ratio. Mixed model ANOVAs were used to determine the effects of group and testing conditions. Results: The CAI group demonstrated greater COP sway parameters compared to other groups under all testing conditions. The main significant effect of vision was observed for all COP parameters with greater COP sway during eyes closed compared to eyes open (P < 0.05). The main effect of a cognitive task was significant with reduced COP sway while performing the secondary cognitive compared to a single task in all three groups (P < 0.05). The cognitive task results revealed significantly longer reaction times in the CAI group compared to copers and healthy individuals (p < 0.05). Significance: Considering postural control deficits in CAI, especially in eye-closed condition and effects of cognitive loading, may guide us to improve postural control in those with CAI with neurocognitive training. Furthermore, no difference between coper and healthy groups may imply a successful compensatory postural control mechanism in copers. © 2020
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