Increased Visual Utilization in Chronic Ankle Instability: A Meta-analysis.

Purpose: The underlying cause of balance impairments in chronic ankle instability (CAI) patients remains unknown but an altered utilization of sensory information has been hypothesized as a potential cause. The purpose of this systematic review with meta-analysis was to determine if CAI patients utilize somatosensory information to the same extent as uninjured controls during static single limb stance. Method: We searched PubMed, CINAHL, SPORTDiscus, and Scopus databases from origin to March 2016 using the combination of key words including: postural control, postural stability, single limb stance, single leg stance, single leg balance, single limb balance, time-to-boundary, or TTB. Eligible studies had to include instrumented single leg stance with both eyes open (EO) and closed (EC) in healthy, CAI, or both groups as well as report time-to-boundary (TTB) means and standard deviations (SD). Results: A total of 11 articles were identified. Effect sizes using EC to EO standardized mean differences (SMD) and 95% confidence intervals (CI) were calculated for all studies that were included in this investigation. Similarly, pooled estimates for each TTB outcome were compared between the CAI and uninjured control groups. The 95% CI of the mediolateral (ML) TTB mean (Control: -1.50 (-1.71 to -1.29), CAI: -2.04 (-2.31 to -1.77)), anterioposterior (AP) mean (Control: -2.19 (-2.43 to -1.96), CAI: -2.82 (-3.13 to -2.52)), and AP SD (Control: -1.81 (-2.03 to -1.58), CAI: -2.50 (-2.79 to -2.22)) did not overlap, indicating significant differences between two groups. Conclusion: On the basis of our systematic review with meta-analysis, it appears that CAI patients do not utilize somatosensory information to the same extent as uninjured controls and instead upregulate the use of visual information during single limb stance. (C) 2016 American College of Sports Medicine

from Sports Medicine via xlomafota13 on Inoreader http://ift.tt/1Tj8XgS
via IFTTT