Reducing anterior tibial translation by applying functional electrical stimulation in dynamic knee extension exercises: Quantitative results acquired via marker tracking
Journal
Clinical Biomechanics
Journal Volume
28
Journal Issue
5
Pages
549-554
Date Issued
2013
Author(s)
Abstract
Background: Pain that accompanies anterior cruciate ligament deficiency during dynamic knee extension exercises is usually caused by excessive anterior tibial translation, which can be restricted if the anterior cruciate ligament was intact. Methods: A functional electrical stimulator is incorporated with a training device to induce hamstring contractions during certain degrees of knee extension to replicate effects similar to those generated by an intact anterior cruciate ligament and to reduce anterior tibial translation. By using a camera that tracks markers placed on bony prominences of the femur and tibia, the anterior tibial translations corresponding to various settings were determined by customized image processing procedures. Findings: In the electrical stimulation sessions, the knee extensions with electrical stimulation feedback induced significantly (n = 6, P < .05) less anterior tibial translation over the range of 20 to 50° when compared to those using the standard isokinetic shank restraint. Likewise, the knee extensions with an anti-shear device that blocks tibia displacement mechanically also induced significantly (n = 6, P < .05) less anterior tibial translation, but over a different range of knee extension (30 to 70°). Interpretation: Despite the fact that both the electrical stimulator and the anti-shear device assisted in reducing anterior tibial translation, the tendency of the curves generated with the functional electrical stimulation was generally more similar to those generated when using the standard isokinetic shank restraint. ? 2013 Elsevier Ltd. All rights reserved.
SDGs
Other Subjects
Bone; Image processing; Anterior cruciate ligament; Co-contraction; Electrical stimulations; Electrical stimulators; Functional electri-cal stimulations; Functional electrical stimulators; Quantitative result; Training devices; Functional electric stimulation; adult; anterior cruciate ligament; anterior tibial syndrome; anterior tibial translation; article; camera; controlled clinical trial; controlled study; dynamic exercise; dynamic knee extension exercise; femur; functional electrical stimulation; functional electrical stimulator; hamstring; human; human experiment; image processing; Johnson anti shear device; male; muscle contraction; muscle stimulator; normal human; orthopedic therapeutic device; priority journal; quantitative analysis; tibia; tibialis anterior muscle; anterior cruciate ligament; arthralgia; clinical trial; electrostimulation; exercise; joint characteristics and functions; knee; movement (physiology); pathophysiology; physiology; tibia; young adult; arthralgia; knee; physiology; Adult; Anterior Cruciate Ligament; Arthralgia; Electric Stimulation; Exercise; Healthy Volunteers; Humans; Knee Joint; Male; Movement; Range of Motion, Articular; Tibia; Young Adult; Adult; Anterior Cruciate Ligament; Arthralgia; Electric Stimulation; Exercise; Healthy Volunteers; Humans; Knee Joint; Male; Movement; Range of Motion, Articular; Tibia; Young Adult
Publisher
Elsevier Ltd
Type
journal article