scholarly journals The Effect of Heel Height of Shoe on Ankle Muscle Activation Pattern in Women with Functional Ankle Instability during Stair Descending

2021 ◽  
Vol 11 (04) ◽  
pp. 666
Author(s):  
F Ghaderi ◽  
E. Shahmoradi ◽  
M. Moghadam Salimi ◽  
M. Asghari Jafarabadi ◽  
S. Goljarian
Keyword(s):  
Muscle Activation ◽  
Ankle Instability ◽  
Activation Pattern ◽  
Functional Ankle Instability ◽  
Muscle Activation Pattern ◽  
Heel Height ◽  
Ankle Muscle

Peroneus Longus Muscle Activation Pattern during Gait Cycle in Athletes Affected by Functional Ankle Instability

2005 ◽  
Vol 33 (8) ◽  
pp. 1183-1187 ◽  
Author(s):  
Valter Santilli ◽  
Massimo A. Frascarelli ◽  
Marco Paoloni ◽  
Flaminia Frascarelli ◽  
Filippo Camerota ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Muscle Activation ◽  
Gait Cycle ◽  
Ankle Instability ◽  
Activation Pattern ◽  
Activation Time ◽  
Functional Ankle Instability ◽  
Peroneus Longus ◽  
Injured Side ◽  
Longus Muscle

Background Functional ankle instability is a clinical syndrome that may develop after acute lateral ankle sprain. Although several causes of this functional instability have been suggested, it is still unclear what the activation pattern of the peroneus longus muscle is in patients with functional ankle instability. Hypothesis Peroneus longus activation patterns differ in the injured side and the uninjured side in subjects with functional ankle instability. Study Design Descriptive laboratory study. Methods The authors examined 14 subjects with functional ankle instability by using surface electromyography during walking. Activation time of the peroneus longus muscle was expressed as a percentage of the stance phase of the gait cycle. Results A statistically significant decrease in peroneus longus muscle activity was found in the injured side compared with the uninjured side (22.8% ± 4.25% vs 37.6% ± 3.5%, respectively). Conclusions Results obtained in this study show a change in peroneus longus muscle activation time after injury. Independent of the origin of this change, which could only be surmised, the decrease in peroneus longus muscle activity may result in reduced protection against lateral sprains. Clinical Relevance The assessment of peroneus longus activation pattern during gait is useful to design an appropriate rehabilitation program in athletes suffering from functional ankle instability.

scholarly journals Muscle Activation Pattern During Isometric Ab Wheel Rollout Exercise in Different Shoulder Angle-Positions

2015 ◽  
Vol 2 (4) ◽  
Author(s):  
Paulo Henrique Marchetti ◽  
Brad J. Schoenfeld ◽  
Josinaldo Jarbas da Silva ◽  
Mauro Antonio Guiselini ◽  
Fabio Sisconeto de Freitas ◽  
...  
Keyword(s):  
Muscle Activation ◽  
Activation Pattern ◽  
Muscle Activation Pattern ◽  
Shoulder Angle

Trunk peak torque, muscle activation pattern and sudden loading compensation in adolescent athletes with back pain

2019 ◽  
Vol 32 (3) ◽  
pp. 379-388
Author(s):  
Steffen Mueller ◽  
Josefine Stoll ◽  
Michael Cassel ◽  
Tilman Engel ◽  
Juliane Mueller ◽  
...  
Keyword(s):  
Back Pain ◽  
Muscle Activation ◽  
Peak Torque ◽  
Activation Pattern ◽  
Adolescent Athletes ◽  
Muscle Activation Pattern ◽  
Sudden Loading

A comparison of lower limb muscle activation pattern using voluntary response index between pronated and normal foot structures during forward jump landing

2018 ◽  
Vol 22 (2) ◽  
pp. 379-384
Author(s):  
Hosein Kouhzad Mohammadi ◽  
Mohammad Mehravar ◽  
Khosro Khademi Kalantari ◽  
Sedighe Sadat Naimi ◽  
Alireza Akbarzadeh Baghban ◽  
...  
Keyword(s):  
Lower Limb ◽  
Muscle Activation ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Activation Pattern ◽  
Muscle Activation Pattern ◽  
Response Index ◽  
Jump Landing ◽  
Voluntary Response

Peroneal Activation Deficits in Persons with Functional Ankle Instability

2009 ◽  
Vol 37 (5) ◽  
pp. 982-988 ◽  
Author(s):  
Riann M. Palmieri-Smith ◽  
J. Ty Hopkins ◽  
Tyler N. Brown
Keyword(s):  
Ankle Sprain ◽  
Muscle Activation ◽  
Ankle Instability ◽  
Cross Sectional Study ◽  
Functional Ankle Instability ◽  
Level Of Evidence ◽  
Cross Sectional ◽  
Emg Amplitude ◽  
Muscle Inhibition ◽  
Arthrogenic Muscle Inhibition

Background Functional ankle instability (FAI) may be prevalent in as many as 40% of patients after acute lateral ankle sprain. Altered afference resulting from damaged mechanoreceptors after an ankle sprain may lead to reflex inhibition of surrounding joint musculature. This activation deficit, referred to as arthrogenic muscle inhibition (AMI), may be the underlying cause of FAI. Incomplete activation could prevent adequate control of the ankle joint, leading to repeated episodes of instability. Hypothesis Arthrogenic muscle inhibition is present in the peroneal musculature of functionally unstable ankles and is related to dynamic peroneal muscle activity. Study Design Cross-sectional study; Level of evidence, 3. Methods Twenty-one (18 female, 3 male) patients with unilateral FAI and 21 (18 female, 3 male) uninjured, matched controls participated in this study. Peroneal maximum H-reflexes and M-waves were recorded bilaterally to establish the presence or absence of AMI, while electromyography (EMG) recorded as patients underwent a sudden ankle inversion perturbation during walking was used to quantify dynamic activation. The H:M ratio and average EMG amplitudes were calculated and used in data analyses. Two-way analyses of variance were used to compare limbs and groups. A regression analysis was conducted to examine the association between the H:M ratio and the EMG amplitudes. Results The FAI patients had larger peroneal H:M ratios in their nonpathological ankle (0.399 ± 0.185) than in their pathological ankle (0.323 ± 0.161) (P = .036), while no differences were noted between the ankles of the controls (0.442 ± 0.176 and 0.425 ± 0.180). The FAI patients also exhibited lower EMG after inversion perturbation in their pathological ankle (1.7 ± 1.3) than in their uninjured ankle (EMG, 3.3 ± 3.1) (P < .001), while no differences between legs were noted for controls (P > .05). No significant relationship was found between the peroneal H:M ratio and peroneal EMG (P > .05). Conclusion Arthrogenic muscle inhibition is present in the peroneal musculature of persons with FAI but is not related to dynamic muscle activation as measured by peroneal EMG amplitude. Reversing AMI may not assist in protecting the ankle from further episodes of instability; however dynamic muscle activation (as measured by peroneal EMG amplitude) should be restored to maximize ankle stabilization. Dynamic peroneal activity is impaired in functionally unstable ankles, which may contribute to recurrent joint instability and may leave the ankle vulnerable to injurious loads.

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