Postural control strategies during single limb stance following acute lateral ankle sprain

Title: Postural control strategies during single limb stance following acute lateral ankle sprain
Authors: Doherty, Cailbhe
Bleakley, Chris J.
Hertel, Jay
Caulfield, Brian
Ryan, John
Delahunt, Eamonn
Permanent link: http://hdl.handle.net/10197/9027
Date: Jun-2014
Abstract: Single-limb stance is maintained via the integration of visual, vestibular and somatosensory afferents. Musculoskeletal injury challenges the somatosensory system to reweight distorted sensory afferents. This investigation supplements kinetic analysis of eyes-open and eyes-closed single-limb stance tasks with a kinematic profile of lower limb postural orientation in an acute lateral ankle sprain group to assess the adaptive capacity of the sensorimotor system to injury. Sixty-six participants with first-time acute lateral ankle sprain completed a 20-second eyes-open single-limb stance task on their injured and non-injured limbs (task 1). Twenty-three of these participants successfully completed the same 20-second single-limb stance task with their eyes closed (task 2). A non-injured control group of 19 participants completed task 1, with 16 completing task 2. 3-dimensional kinematics of the hip, knee and ankle joints, as well as associated fractal dimension of the center-of-pressure path were determined for each limb during these tasks. Between trial analyses revealed significant differences in stance limb kinematics and fractal dimension of the center-of-pressure path for task 2 only. The control group bilaterally assumed a position of greater hip flexion compared to injured participants on their side-matched “involved”(7.41 [6.1°] vs 1.44 [4.8]°; η2 = .34) and “uninvolved” (9.59 [8.5°] vs 2.16 [5.6°]; η2 = .31) limbs, with a greater fractal dimension of the center-of-pressure path (involved limb = 1.39 [0.16°] vs 1.25 [0.14°]; uninvolved limb = 1.37 [0.21°] vs 1.23 [0.14°]). Bilateral impairment in postural control strategies present following a first time acute lateral ankle sprain.
Funding Details: Health Research Board
Type of material: Journal Article
Publisher: Elsevier
Journal: Clinical Biomechanics
Volume: 29
Issue: 6
Start page: 643
End page: 649
Copyright (published version): 2014 Elsevier
Keywords: Personal SensingAnkle jointBiomechanicsKinematicsKineticsPostural balance
DOI: 10.1016/j.clinbiomech.2014.04.012
Language: en
Status of Item: Peer reviewed
Appears in Collections:Public Health, Physiotherapy and Sports Science Research Collection
Insight Research Collection
Institute for Sport & Health Research Collection

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