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Related Concept Videos

Ankle Joint01:10

Ankle Joint

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The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
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Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
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Biomechanical Response to External Biofeedback During Functional Tasks in Individuals With Chronic Ankle Instability.

Danielle M Torp1, Abbey C Thomas1, Tricia Hubbard-Turner1

  • 1Department of Kinesiology, University of North Carolina at Charlotte.

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|February 18, 2021
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Summary

Real-time visual and auditory biofeedback improved balance strategies in individuals with chronic ankle instability (CAI). These methods effectively modified biomechanics during functional tasks, offering new intervention possibilities.

Keywords:
ankle sprainsbalanceexternal focus of attention

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Area of Science:

  • Biomechanics
  • Sports Medicine
  • Rehabilitation

Background:

  • Altered biomechanics in chronic ankle instability (CAI) contribute to recurrent injuries and osteoarthritis.
  • Current interventions fail to adequately address these biomechanical issues.

Purpose of the Study:

  • To investigate the real-time effects of visual and auditory biofeedback on functional-task biomechanics in individuals with CAI.

Main Methods:

  • A crossover study involving 19 physically active adults with CAI.
  • Participants performed balance, step down, hop, and lunge tasks under baseline and biofeedback conditions.
  • Visual biofeedback used a laser; auditory biofeedback used a pressure sensor and buzzer to cue proper foot placement and pressure distribution.

Main Results:

  • Both biofeedback types altered center-of-pressure (COP) distribution during balance tasks.
  • Visual biofeedback increased lateral heel pressure during hops.
  • Auditory biofeedback influenced pressure during step downs and lunges, with some effects differing between eyes-open and eyes-closed conditions.

Conclusions:

  • Real-time biofeedback, both visual and auditory, demonstrated improvements in balance strategies.
  • External biofeedback effectively moderated biomechanics during various functional tasks in individuals with CAI.