Atypical shoulder muscle activation in multidirectional instability

Barden, John M.; Balyk, Robert; Raso, V.J.; Moreau, Marc; Bagnall, K. M.

doi:10.1016/j.clinph.2005.04.019

Cited by 105 publications

(73 citation statements)

References 37 publications

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“…On the other hand, Illyes and Kiss [4] observed an increase in anterior deltoid muscle activity but no change of the middle deltoid during shoulder elevations. The anterior and middle deltoids, along with the scapular muscles, also showed no alterations in either their onset, duration, or magnitude of activation in recent studies [6,8]. Several factors may account for the disparity in results presented by these studies such as type of labor activity, etiology (traumatic and atraumatic instability), or differences in symptoms and coexisting injuries (e.g., presence of pain and impingement syndrome in addition to AGI).…”

Section: Introductioncontrasting

confidence: 38%

“…Particularly, it was found that EMG activity of the anterior AD, BIC and TrIC decreased while the EMG activity of the infraspinatus increased for the group with shoulder instability compared with a control group [4]. In contrast, Barden et al [8] found no significant difference in EMG amplitudes during isotonic concentric/eccentric movements of the shoulder joint in individuals with multidirectional instability. Therefore, certain movements such as pitching and isokinetic movements (at constant velocity) may possibly require greater stability and higher muscle torque at the shoulder joint.…”

Section: Discussionmentioning

confidence: 80%

“…Therefore, certain movements such as pitching and isokinetic movements (at constant velocity) may possibly require greater stability and higher muscle torque at the shoulder joint. The latter movement, for example, requires excessive force at the beginning of the movement [8]. This may compromise joint stability to a level that would affect the generation and modulation of the EMG activity of these muscles.…”

Section: Discussionmentioning

confidence: 99%

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Muscular activation patterns in swimmers with asymptomatic shoulder joint instability

Santos¹,

Soldado²,

Marconi³

et al. 2018

Hum Mov.

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Purpose. The aim of this study was to investigate the (electromyographic) EMG patterns of the shoulder muscles in asymptomatic swimmers with AGI -atraumatic glenohumeral instability. AGI, one of the most common shoulder disorders in athletes who perform overhead activities, occurs especially among swimmers. AGI usually provokes shoulder pain and secondary impingement syndrome, which might alter glenohumeral and scapular kinematics and change the activity of the shoulder muscles. Alternatively, pain or functional activities might affect EMG patterns in individuals with AGI. Methods. Eight swimmers with AGI and eight healthy swimmers took part in this cross-sectional study. Bilateral and simultaneous shoulder elevations in the scapular plane toward three different target distances were investigated, and the shoulder kinematics and EMG activities of the glenohumeral and scapulothoracic muscles were also collected. Results. No differences in the EMG patterns were found between swimmers with and without AGI in terms of the rate of EMG rise and magnitude. Conclusions. Shoulder instability does not necessarily affect the modulation of the shoulder muscles in swimmers with AGI. Others factors such as laxity in the capsular structures and ligaments may be one of the primary reasons for pain and instability in these athletes.

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Section: Introductioncontrasting

confidence: 38%

Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

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Muscular activation patterns in swimmers with asymptomatic shoulder joint instability

Santos¹,

Soldado²,

Marconi³

et al. 2018

Hum Mov.

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“…According to Teixeira 34 , isolated hypermobility does not cause bad posture, since other factors are involved, such as excessive body weight, insufficient or inadequate physical activity, bad postural habits, bone anomalies, protein deficiency characteristics. Barden et al 35 , add that joint instability caused by mobility excess might compromise the proprioceptive systems.…”

Section: Discussionmentioning

confidence: 99%

Prevalência de hipermobilidade articular em crianças pré-escolares

Neves

Cibinello

Vitor³

et al. 2013

Fisioter. Pesqui.

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| Joint hypermobility is the ability to perform movements with a range of motion that is wider than normal. This study aimed at establishing the prevalence of joint hypermobility in junior kindergarten and senior kindergarten children from the Municipal Education System of Londrina, Paraná, Brasil. The study was cross-sectional, with a sample of 366 children aged between 5 and 6 years. The detection of joint hypermobility was based on the criteria proposed in literature. It was found that 198 (54.1%) of the children evaluated had joint hypermobility, 96 (59.6%) were girls and 102 (49.8%) were boys. Joint hypermobility was found more frequently in the elbow and knee joints, where hyperextension occurred. There was no statistically significant difference between the male and female groups in relation to joint hypermobility (χ 2 =3.539, p=0.072). We can conclude that joint hypermobility found in the junior kindergarten and senior kindergarten children evaluated was common and compatible with the age of the population evaluated in this study.Keywords | joint hypermobility; joint instability; JK and SK children.RESUMO | A hipermobilidade articular é a capacidade de realizar movimentos em amplitudes maiores que a normal. O presente estudo teve como objetivo estabelecer a prevalência de hipermobilidade articular em crianças pré-escolares da Rede Municipal de Educação de Londrina/PR. O estudo foi do tipo transversal com amostra constituída de 366 crianças, de 5 e 6 anos de idade. Verificou-se que, das crianças pré-escolares avaliadas, 198 (54,1%) apresentaram hipermobilidade articular, sendo 96 (59,6%) do sexo feminino e 102 (49,8%) do masculino. A hipermobilidade articular foi encontrada com maior frequência nas articulações de cotovelo e joelho, onde ocorreu a hiperextensão. Não houve diferença estatisticamente significante entre os grupos masculino e feminino em relação à hipermobilidade articular (χ 2 =3,539, p=0,072). Pode-se concluir que a hipermobilidade articular nas crianças pré-escolares foi achado comum, compatível com a faixa etária da população avaliada no estudo.Descritores | hipermobilidade articular; instabilidade articular; crianças pré-escolares.RESUMEN | La hipermovilidad articular es la capacidad de realizar movimientos en amplitudes mayores que lo normal. El presente estudio tuvo como objetivo establecer la prevalencia de hipermovilidad articular en niños pre-escolares de la Red Municipal de Educación de Londrina/ PR. El estudio fue de tipo transversal con una muestra constituida de 366 niños, de 5 a 6 años de edad. Se verificó que los niños pre-escolares evaluados, 198 (54,1%) presentaron hipermovilidad articular, siendo 96 (59,6%) de sexo femenino y 102 (49,8%) de sexo masculino. La hipermovilidad articular fue encontrada con mayor frecuencia en las articulaciones del tobillo y rodilla, donde ocurre la Neves et al. Hypermobility in JK and SK children 159

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“…29,[56][57][58][59] Normal force coupling that exists to dynamically stabilize the glenohumeral joint is altered resulting in excessive humeral head migration and a feeling of subluxation by the patient. Rockwood and Burkhead 39 found that an exercise program was effective in the management of 80% of atraumatic instability.…”

Section: Figurementioning

confidence: 99%