Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

10.3791/61592 ◽  
2020 ◽  
Author(s):  
Lulu Yin ◽  
Zhangqi Lai ◽  
Xiaoyue Hu ◽  
Kun Liu ◽  
Lin Wang
Keyword(s):  
Lower Extremity ◽  
Postural Control ◽  
Muscle Activation ◽  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Lower Extremity Muscle

Lower Extremity Muscle Activation During Functional Exercises in Patients With and Without Chronic Ankle Instability

PM&R ◽  
2014 ◽  
Vol 6 (7) ◽  
pp. 602-611 ◽  
Author(s):  
Mark A. Feger ◽  
Luke Donovan ◽  
Joseph M. Hart ◽  
Jay Hertel
Keyword(s):  
Lower Extremity ◽  
Muscle Activation ◽  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Lower Extremity Muscle

Does chronic ankle instability influence lower extremity muscle activation of females during landing?

2018 ◽  
Vol 38 ◽  
pp. 81-87 ◽  
Author(s):  
Yumeng Li ◽  
Jupil Ko ◽  
Marika A. Walker ◽  
Cathleen N. Brown ◽  
Julianne D. Schmidt ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Muscle Activation ◽  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Lower Extremity Muscle

scholarly journals Tai Chi training’s effect on lower extremity muscle co-contraction during single- and dual-task gait: Cross-sectional and randomized trial studies

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0242963
Author(s):  
Peter M. Wayne ◽  
Brian J. Gow ◽  
Fengzhen Hou ◽  
Yan Ma ◽  
Jeffrey M. Hausdorff ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Postural Control ◽  
Usual Care ◽  
Randomized Trial ◽  
Dual Task ◽  
Muscle Activation ◽  
Tai Chi ◽  
Mean Difference ◽  
Cross Sectional ◽  
Lower Extremity Muscle

Background Tai Chi (TC) mind-body exercise has been shown to reduce falls and improve balance and gait, however, few studies have evaluated the role of lower extremity muscle activation patterns in the observed benefits of TC on mobility. Purpose To perform an exploratory analysis of the association between TC training and levels of lower extremity muscle co-contraction in healthy adults during walking under single-task (ST) and cognitive dual-task (DT) conditions. Methods Surface electromyography of the anterior tibialis and lateral gastrocnemius muscles was recorded during 90 sec trials of overground ST (walking normally) and DT (walking with verbalized serial subtractions) walking. A mean co-contraction index (CCI), across all strides, was calculated based on the percentage of total muscle activity when antagonist muscles were simultaneously activated. A hybrid study design investigated long-term effects of TC via a cross-sectional comparison of 27 TC experts and 60 age-matched TC-naïve older adults. A longitudinal comparison assessed the shorter-term effects of TC; TC-naïve participants were randomly allocated to either 6 months of TC training or to usual care. Results Across all participants at baseline, greater CCI was correlated with slower gait speed under DT (β(95% CI) = -26.1(-48.6, -3.7)) but not ST (β(95% CI) = -15.4(-38.2, 7.4)) walking. Linear models adjusting for age, gender, BMI and other factors that differed at baseline indicated that TC experts exhibited lower CCI compared to TC naives under DT, but not ST conditions (ST: mean difference (95% CI) = -7.1(-15.2, 0.97); DT: mean difference (95% CI) = -10.1(-18.1, -2.4)). No differences were observed in CCI for TC-naive adults randomly assigned to 6 months of TC vs. usual care. Conclusion Lower extremity muscle co-contraction may play a role in the observed benefit of longer-term TC training on gait and postural control. Longer-duration and adequately powered randomized trials are needed to evaluate the effect of TC on neuromuscular coordination and its impact on postural control. Trial registration The randomized trial component of this study was registered at ClinicalTrials.gov (NCT01340365).

scholarly journals Muscle-Activation Onset Times With Shoes and Foot Orthoses in Participants With Chronic Ankle Instability

2015 ◽  
Vol 50 (7) ◽  
pp. 688-696 ◽  
Author(s):  
Bart Dingenen ◽  
Louis Peeraer ◽  
Kevin Deschamps ◽  
Steffen Fieuws ◽  
Luc Janssens ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Linear Model ◽  
Muscle Activity ◽  
Muscle Activation ◽  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Foot Orthoses ◽  
Experimental Conditions ◽  
Peroneus Longus ◽  
Hip Muscles

Context Participants with chronic ankle instability (CAI) use an altered neuromuscular strategy to shift weight from double-legged to single-legged stance. Shoes and foot orthoses may influence these muscle-activation patterns. Objective To evaluate the influence of shoes and foot orthoses on onset times of lower extremity muscle activity in participants with CAI during the transition from double-legged to single-legged stance. Design Cross-sectional study. Setting Musculoskeletal laboratory. Patients or Other Participants A total of 15 people (9 men, 6 women; age = 21.8 ± 3.0 years, height = 177.7 ± 9.6 cm, mass = 72.0 ± 14.6 kg) who had CAI and wore foot orthoses were recruited. Intervention(s) A transition task from double-legged to single-legged stance was performed with eyes open and with eyes closed. Both limbs were tested in 4 experimental conditions: (1) barefoot (BF), (2) shoes only, (3) shoes with standard foot orthoses, and (4) shoes with custom foot orthoses (SCFO). Main Outcome Measure(s) The onset of activity of 9 lower extremity muscles was recorded using surface electromyography and a single force plate. Results Based on a full-factorial (condition, region, limb, vision) linear model for repeated measures, we found a condition effect (F3,91.8 = 9.39, P < .001). Differences among experimental conditions did not depend on limb or vision condition. Based on a 2-way (condition, muscle) linear model within each region (ankle, knee, hip), earlier muscle-activation onset times were observed in the SCFO than in the BF condition for the peroneus longus (P < .001), tibialis anterior (P = .003), vastus medialis obliquus (P = .04), and vastus lateralis (P = .005). Furthermore, the peroneus longus was activated earlier in the shoes-only (P = .02) and shoes-with-standard-foot-orthoses (P = .03) conditions than in the BF condition. No differences were observed for the hip muscles. Conclusions Earlier onset of muscle activity was most apparent in the SCFO condition for ankle and knee muscles but not for hip muscles during the transition from double-legged to single-legged stance. These findings might help clinicians understand how shoes and foot orthoses can influence neuromuscular control in participants with CAI.

scholarly journals Altered Walking Neuromechanics in Patients With Chronic Ankle Instability

2019 ◽  
Vol 54 (6) ◽  
pp. 684-697 ◽  
Author(s):  
S. Jun Son ◽  
Hyunsoo Kim ◽  
Matthew K. Seeley ◽  
J. Ty Hopkins
Keyword(s):  
Lower Extremity ◽  
Muscle Activation ◽  
Comprehensive Evaluation ◽  
Ankle Instability ◽  
Plantar Flexion ◽  
Reaction Force ◽  
Chronic Ankle Instability ◽  
Control Group ◽  
Internal Joint ◽  
Knee Abduction

Context The literature on gait kinematics and muscle activation in chronic ankle instability (CAI) is limited. A comprehensive evaluation of all relevant gait measures is needed to examine alterations in gait neuromechanics that may contribute to recurrent sprain. Objective To compare walking neuromechanics, including kinematics, muscle activity, and kinetics (ie, ground reaction force [GRF], moment, and power), between participants with and those without CAI by applying a novel statistical analysis to data from a large sample. Design Controlled laboratory study. Setting Biomechanics laboratory. Patients or Other Participants A total of 100 participants with CAI (49 men, 51 women; age = 22.2 ± 2.3 years, height = 174.0 ± 9.7 cm, mass = 70.8 ± 14.4 kg) and 100 individuals without CAI serving as controls (55 men, 45 women; age = 22.5 ± 3.3 years, height = 173.1 ± 13.3 cm, mass = 72.6 ± 18.7 kg). Intervention(s) Participants performed 5 trials of walking (shod) at a self-selected speed over 2 in-ground force plates. Main Outcome Measure(s) Three-dimensional GRFs, lower extremity joint angles, internal joint moments, joint powers, and activation amplitudes of 6 muscles were recorded during stance. Results Compared with the control group, the CAI group demonstrated (1) increased plantar flexion or decreased dorsiflexion, increased inversion or decreased eversion, decreased knee flexion, decreased knee abduction, and increased hip-flexion angles; (2) increased or decreased inversion, increased plantar flexion, decreased knee extension, decreased knee abduction, and increased hip-extension moments; (3) increased vertical, braking, and propulsive GRFs; (4) increased hip eccentric and concentric power; and (5) altered muscle activation in all 6 lower extremity muscles. Conclusions The CAI group demonstrated a hip-dominant strategy by limiting propulsive forces at the ankle while increasing force generation at the hip. The different walking neuromechanics exhibited by the CAI group could represent maladaptive strategies that developed after the initial sprain or an injurious gait pattern that may have predisposed the participants to their initial injuries. Increased joint loading and altered kinematics at the foot and ankle complex during initial stance could affect the long-term health of the ankle articular cartilage.

Neuromuscular Training Alters Preparatory Lower Extremity Muscle Activation and Movement in Subjects with Ankle Instability

2017 ◽  
Vol 49 (5S) ◽  
pp. 525-526
Author(s):  
J. Ty Hopkins ◽  
S. Jun Son ◽  
Hyunsoo Kim ◽  
Dustin Bruening ◽  
Matthew K. Seeley
Keyword(s):  
Lower Extremity ◽  
Muscle Activation ◽  
Ankle Instability ◽  
Neuromuscular Training ◽  
Lower Extremity Muscle

scholarly journals Bilateral Improvements in Lower Extremity Function After Unilateral Balance Training in Individuals With Chronic Ankle Instability

2014 ◽  
Vol 49 (2) ◽  
pp. 181-191 ◽  
Author(s):  
Sheri A. Hale ◽  
Andrea Fergus ◽  
Rachel Axmacher ◽  
Kimberly Kiser
Keyword(s):  
Lower Extremity ◽  
Postural Control ◽  
Ankle Instability ◽  
Balance Training ◽  
Chronic Ankle Instability ◽  
Control Group ◽  
Lower Extremity Function ◽  
Balance Test ◽  
Extremity Function ◽  
Star Excursion Balance Test

Context: Bilateral improvements in postural control have been reported among individuals with acute lateral ankle sprains and individuals with chronic ankle instability (CAI) when only the unstable ankle is rehabilitated. We do not know if training the stable ankle will improve function on the unstable side. Objective: To explore the effects of a unilateral balance-training program on bilateral lower extremity balance and function in individuals with CAI when only the stable limb is trained. Design: Cohort study. Setting: University clinical research laboratory. Patients or Other Participants: A total of 34 volunteers (8 men, 26 women; age = 24.32 ± 4.95 years, height = 167.01 ± 9.45 cm, mass = 77.54 ± 23.76 kg) with CAI were assigned to the rehabilitation (n = 17) or control (n = 17) group. Of those, 27 (13 rehabilitation group, 14 control group) completed the study. Intervention(s): Balance training twice weekly for 4 weeks. Main Outcome Measure(s): Foot and Ankle Disability Index (FADI), FADI Sport (FADI-S), Star Excursion Balance Test, and Balance Error Scoring System. Results: The rehabilitation and control groups differed in changes in FADI-S and Star Excursion Balance Test scores over time. Only the rehabilitation group improved in the FADI-S and in the posteromedial and anterior reaches of the Star Excursion Balance Test. Both groups demonstrated improvements in posterolateral reach; however, the rehabilitation group demonstrated greater improvement than the control group. When the groups were combined, participants reported improvements in FADI and FADI-S scores for the unstable ankle but not the stable ankle. Conclusions: Our data suggest training the stable ankle may result in improvements in balance and lower extremity function in the unstable ankle. This further supports the existence of a centrally mediated mechanism in the development of postural-control deficits after injury, as well as improved postural control after rehabilitation.

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