Basic Study
Copyright ©The Author(s) 2016. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Orthop. Dec 18, 2016; 7(12): 801-807
Published online Dec 18, 2016. doi: 10.5312/wjo.v7.i12.801
Extrinsic visual feedback and additional cognitive/physical demands affect single-limb balance control in individuals with ankle instability
You-jou Hung, Jacob Miller
You-jou Hung, Jacob Miller, Department of Physical Therapy, Angelo State University, San Angelo, TX 76909, United States
Author contributions: Hung Y analyzed the data; Hung Y wrote the paper; Hung Y and Miller J designed the research; Miller J performed the research.
Institutional review board statement: The study was reviewed and approved by the Angelo State University Institutional Review Board.
Institutional animal care and use committee statement: NA.
Conflict-of-interest statement: No potential conflict-of-interest relevant to the manuscript.
Data sharing statement: Consent for data sharing was not obtained but the presented data are anonymized and risk of identification is low.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See:
Correspondence to: You-jou Hung, PT, MS, PhD, CSCS, Department of Physical Therapy, Angelo State University, ASU Station #10923, San Angelo, TX 76909, United States.
Telephone: +1-325-9422742 Fax: +1-325-9422548
Received: July 18, 2016
Peer-review started: July 21, 2016
First decision: September 5, 2016
Revised: September 6, 2016
Accepted: October 5, 2016
Article in press: October 7, 2016
Published online: December 18, 2016
Core Tip

Core tip: Single-limb balance control with the Biodex Balance System (BBS) was significantly worse without extrinsic visual feedback and with cognitive or physical demands in those with ankle instability. Clinicians should consider a patient’s activity and incorporate proper additional demands in ankle stability testing. In addition, the Athletic Single Leg Stability Test of the BBS may not be a valid tool to examine ankle instability. Further research is needed to examine the validity and reliability of the Athletic Single Leg Stability Test in testing ankle instability.