Ankle kinematics, center of pressure progression, and lower extremity muscle activity during a side-cutting task in participants with and without chronic ankle instability

Review written by Dr Carlo Wood info

Key Points

  1. Athletes with chronic ankle instability who performed a side-cutting task demonstrated significantly greater ankle internal rotation during mid stance.
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BACKGROUND & OBJECTIVE

Lack of care after an ankle sprain can lead to chronic ankle instability (CAI). There is disagreement regarding its effect on neuromuscular control however. The discrepancy ranges from no difference in neuromuscular control in the evertors, to reduced activation of the evertors.

Rapid change of direction (COD) creates a significant load on the ankle. An assessment of kinematics, neuromuscular control and the center-of-pressure (COP) progression provides insight into the sensorimotor constraints that contribute to the ankle ‘giving way’ during COD.

The purpose of this study was to examine ankle kinematics, neuromuscular control and the COP progression during COD in individuals with and without CAI.

Lack of care after an ankle sprain can lead to chronic ankle instability.
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These findings highlight a plausible contribution to the mechanisms of ‘giving way’ in individuals with CAI.

METHODS

15 subjects with CAI and controls volunteered. Electromyography (EMG) recorded muscle activity on the involved limb’s tibialis anterior (TA), medial gastrocnemius (MG), fibularis longus (FL), fibularis brevis (FB), vastus medialis (VM), and semitendinosus (ST) during a side-cutting task. +

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