Neuromuscular control in individuals with chronic ankle instability: A comparison of unexpected and expected ankle inversion perturbations during a single leg drop-landing

Simpson, Jeffrey D.; Stewart, Ethan M.; Turner, Alana J.; Macias, David M.; Wilson, Samuel J.; Chander, Harish; Knight, Adam C.

doi:10.1016/j.humov.2019.01.013

Cited by 34 publications

(40 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The authors reported no group differences between people with CAI and individuals who had an ankle sprain but learned to cope and returned to pre-injury levels of function [ 34 ]. Likewise, several studies that evaluated EMG amplitude of leg muscles during dynamic tasks such as jump landings also reported no differences between participants with CAI and matched healthy controls [ 35 – 37 ]. For example, a recently published study by Simpson and colleagues [ 37 ] recorded muscle activity from the peroneus longus and peroneus brevis, tibialis anterior, and medial gastrocnemius, during pre- to post unexpected and expected single leg drop-landings.…”

Section: Discussionmentioning

confidence: 99%

“…Likewise, several studies that evaluated EMG amplitude of leg muscles during dynamic tasks such as jump landings also reported no differences between participants with CAI and matched healthy controls [ 35 – 37 ]. For example, a recently published study by Simpson and colleagues [ 37 ] recorded muscle activity from the peroneus longus and peroneus brevis, tibialis anterior, and medial gastrocnemius, during pre- to post unexpected and expected single leg drop-landings. No differences in average EMG amplitude were found between individuals with CAI and healthy controls.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Muscle activation patterns during backward walking in people with chronic ankle instability

Balasukumaran¹,

Gottlieb²,

Springer³

2020

BMC Musculoskelet Disord

View full text Add to dashboard Cite

Background: Altered walking patterns are often described in individuals with chronic ankle instability (CAI). Contemporary treatment paradigms recommend backward walking (BW) to improve locomotion in people with musculoskeletal disorders. The purpose of this study was to determine whether muscle activity and activation variability during BW differs between subjects with and without CAI. Methods: Sixteen participants with CAI and 16 healthy controls walked on a treadmill at their self-selected speed under BW and forward walking (FW) conditions. Surface electromyography (EMG) data for the peroneus longus, tibialis anterior, medial gastrocnemius and gluteus medius muscles were collected. EMG amplitude normalized to maximum voluntary isometric contraction (%MVIC) and the standard deviation (SD) of the %MVIC EMG amplitude was calculated throughout the gait cycle. In addition, the area under the curve (AUC) of the %MVIC EMG amplitude was calculated before and after initial contact (pre-IC: 90-100% of stride; post-IC: 0-10% of stride). Results: No differences between groups were noted in the %MVIC amplitude or activation variability (SD of %MVIC EMG) under BW or FW. In both groups, decreased tibialis anterior (p < 0.001) and gluteus medius (p = 0.01), and increased medial gastrocnemius (p < 0.001) activation were observed during pre-and post-IC under BW condition. Conclusion: Participants with CAI and healthy controls have similar muscle activity patterns during BW. Yet, the results should be interpreted with caution due to the heterogeneity of the CAI population.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Muscle activation patterns during backward walking in people with chronic ankle instability

Balasukumaran¹,

Gottlieb²,

Springer³

2020

BMC Musculoskelet Disord

View full text Add to dashboard Cite

show abstract

“…It is widely acknowledged that muscle activation prior to landing is pre-activated and is based on previous experience (i.e., feed-forward), while muscle activation subsequent to landing is reactive (i.e., feedback) [ 39 ]. However, if the preparatory muscle activity is insufficient to stabilize the joint, individuals have to rely more on the reflex mechanism of the lower extremity muscles in order to regain stability [ 40 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Plyometric and Balance Training on Neuromuscular Control of Recreational Athletes with Functional Ankle Instability: A Randomized Controlled Laboratory Study

Huang

Jankaew

Lin

2021

IJERPH

View full text Add to dashboard Cite

Plyometric exercise has been suggested for knee injury prevention in sports participation, but studies on ankle plyometric training are limited. This study aims to investigate the change of joint position sense and neuromuscular activity of the unstable ankle after six-week integrated balance/plyometric training and six-week plyometric training. Thirty recreational athletes with functional ankle instability were allocated into three groups: plyometric group (P) vs. plyometric integrated with balance training group (BP) vs. control group (C). Ankle joint position sense, integrated electromyography (EMG), and balance adjusting time during medial single-leg drop-landing tasks were measured before and after the training period. Following the six-week period, both training groups exhibited a lower absolute error in plantar flexion (P group: pre: 3.79° ± 1.98°, post: 2.20° ± 1.31°, p = 0.016; BP group: pre: 4.10° ± 1.87°, post: 2.94° ± 1.01°, p = 0.045), and the integrated group showed a lower absolute error in inversion angles (pre 2.24° ± 1.44° and post 1.48° ± 0.93°, p = 0.022), and an increased integrated EMG of ankle plantar flexors before landing. The plyometric group exhibited a higher integrated EMG of the tibialis anterior before and after landing (pre: 102.88 ± 20.93, post: 119.29 ± 38.33, p = 0.009 in post-landing) and a shorter adjusting time of the plantar flexor following landing as compared to the pre-training condition (pre: 2.85 ± 1.15 s, post: 1.87 ± 0.97 s, p = 0.006). In conclusion, both programs improved ankle joint position sense and muscle activation of the ankle plantar flexors during single-leg drop landing. The plyometric group showed a reduced adjusting time of the ankle plantar flexor following the impact from drop landing.

show abstract

“…The absence of significant between-group knee kinematic difference could also be explained by the height of the platform (46 cm). In previous studies assessing unilateral drop landing neuromechanics, the initial drop height ranged from 30 to 40 cm 10,11,13,21,22,27 . Although, drop height alters landing kinematics 28 , it is still unknown whether these changes are different for individuals with and without CAI.…”

Section: Discussionmentioning

confidence: 99%

“…Most studies exploring unilateral jump landing neuromechanics in individuals with CAI investigated landing on a level surface 9 even though they can laterally sprain their ankles on surfaces with a variety of hardness or inclination. During jump landing on a laterally inclined 13 or an unstable 14 surface, lower-limb neuromechanics is altered which may predispose individuals with CAI to sustain recurrent LAS. Investigating lower-limb neuromechanics during more challenging and clinically meaningful jump landing tasks is essential to improve clinicians' and researchers' understanding of the underlying landing adaptations in CAI.…”

Section: Introductionmentioning

confidence: 99%

Unilateral jump landing neuromechanics of individuals with chronic ankle instability

Moisan

Mainville

Descarreaux

et al. 2020

Journal of Science and Medicine in Sport

View full text Add to dashboard Cite

Neuromuscular control in individuals with chronic ankle instability: A comparison of unexpected and expected ankle inversion perturbations during a single leg drop-landing

Cited by 34 publications

References 34 publications

Muscle activation patterns during backward walking in people with chronic ankle instability

Muscle activation patterns during backward walking in people with chronic ankle instability

Effects of Plyometric and Balance Training on Neuromuscular Control of Recreational Athletes with Functional Ankle Instability: A Randomized Controlled Laboratory Study

Unilateral jump landing neuromechanics of individuals with chronic ankle instability

Contact Info

Product

Resources

About