@article{ref1,
title="Acute ankle sprain injury alters kinematic and centre of pressure measures of postural control during single limb stance",
journal="British journal of sports medicine",
year="2014",
author="Doherty, C. and Delahunt, E. and Bleakley, C. and Hertel, J. and Ryan, J. and Caulfield, B.",
volume="48",
number="7",
pages="586-586",
abstract="BACKGROUND: Upright single-limb stance (SLS) is maintained via integration of visual, vestibular and somatosensory afferents. The presence of redundancies between these afferents allows the sensorimotor system to simplify a specific task within a number of strategies. Musculoskeletal injury challenges the somatosensory system to reweight distorted sensory afferents. No current investigation has supplemented kinetic analysis of eyes-open and eyes-closed SLS tasks with a kinematic profile of lower limb postural orientation in an acute lateral ankle sprain (LAS) group to assess the adaptive capacity of the sensorimotor system to injury. OBJECTIVE: To compare centre of pressure (COP) and lower limb postural orientation characteristics of participants with acute LAS to non-injured participants during a SLS task. DESIGN: Cross-sectional. SETTING: University biomechanics laboratory. PARTICIPANTS: 66 participants with acute LAS completed a task of eyes-open SLS on their injured and non-injured limbs (task 1). 23 of these participants successfully completed the SLS task with their eyes closed (task 2). A non-injured control group of nineteen participants completed task 1, with 16 completing task 2. MAIN OUTCOME MEASURES: 3D kinematics of the hip, knee and ankle joints as well as associated fractal dimension (FD) of the COP path. RESULTS: Between trial analyses of groups revealed significant differences in lower limb kinematics and FD of the COP path for task 2. Post-hoc testing revealed that non-injured control group bilaterally assumed a position of greater hip flexion compared to LAS participants (injured limb=7.41±6.1 vs 1.44±4.8; non-injured limb=9.59±8.5 vs 2.16±5.6), with a corollary of greater FD of the COP path (injured limb=1.39±0.16 vs 1.25±0.14; non-injured limb=1.37±0.21 vs 1.23±0.14). CONCLUSION: Acute LAS causes bilateral impairment in postural control strategies.<p /> <p>Language: en</p>",
language="en",
issn="0306-3674",
doi="10.1136/bjsports-2014-093494.72",
url="http://dx.doi.org/10.1136/bjsports-2014-093494.72"
}