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Caracterização da atividade muscular do complexo articular do ombro em utentes com dor cervical crónica de origem não específica: estudo transversal
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Abstract(s)
Introdução: A dor cervical crónica de origem não-específica (DCCNE) é uma condição
músculo-esquelética prevalente. Estudos prévios apontam para uma possível associação
entre a DCCNE e ativação muscular (AM) do complexo articular do ombro (CAO),
especialmente os músculos axioscapulares. Existem estudos que analisam a AM do CAO em
pessoas com DCCNE, mas os resultados são pouco consistentes e conflituosos.
Objectivo: Descrever e caracterizar a AM do CAO em indivíduos com DCCNE, em relação
a um grupo controlo saudável.
Metodologia: Foi realizado um estudo transversal de caso-controlo, com 30 participantes,
divididos em grupo com DCCNE (grupos de casos) e grupo controlo, emparelhados por
idade e sexo. A AM do Serrátil Anterior (SA), Trapézio Superior (TS), Médio (TM) e
Inferior (TI) foi medida via eletromiografia de superfície (EMGs) durante tarefas de flexão
do ombro. Avaliaram-se a intensidade de dor (END) e incapacidade funcional da cervical e
do CAO (Neck Disability Index e QuickDASH).
Resultados: Não foram encontradas diferenças estatisticamente significativas na AM do
CAO entre os grupos, sugerindo que esta é semelhante em pessoas com DCCNE e pessoas
saudáveis. Contudo, observaram-se correlações moderadas, no grupo de DCCNE, entre o
rácio TS/TI e intensidade de dor (ρ=0,542; p=0,037) e incapacidade funcional do CAO
(ρ=0,600; p=0,018), indicando que a hiperatividade do TS relativamente ao TI pode estar
associada a maior intensidade de dor cervical e incapacidade do CAO.
Conclusão: Os resultados sugerem que a AM do CAO é semelhante entre indivíduos com
DCCNE e saudáveis, embora desequilíbrios no rácio TS/TI no grupo de DCCNE possam
estar associados a maior intensidade de dor na cervical e incapacidade funcional do CAO.
Estes achados destacam a importância de estudos futuros que incorporem análises cinemáticas para explorar a interação entre a AM e a mobilidade da escápula, promovendo
uma compreensão mais abrangente das adaptações musculares na DCCNE.
Keywords: Chronic Neck Pain; Shoulder Muscle Activity; Surface Electromyography; Neck Disability Index; QuickDASH Introduction: Chronic non-specific neck pain (CNSNP) is a prevalent musculoskeletal condition. Previous studies suggest a possible association between CNSNP and muscle activation (MA) of the shoulder girdle complex (SGC), particularly in axioscapular muscles. Although research has examined SGC MA in individuals with CNSNP, findings are inconsistent and sometimes conflicting. Objective: To describe and characterize SGC MA in individuals with CNSNP compared to a healthy control group. Methodology: A cross-sectional case-control study was conducted with 30 participants divided into a CNSNP group (cases) and a control group, matched by age and sex. MA of the Serratus Anterior (SA), Upper Trapezius (UT), Middle Trapezius (MT), and Lower Trapezius (LT) was measured using surface electromyography (EMG) during shoulder flexion tasks. Pain intensity (Numeric Pain Rating Scale) and functional disability of the cervical spine and SGC (Neck Disability Index and QuickDASH) were also assessed. Results: No statistically significant differences in SGC MA were found between groups, suggesting similar activation in individuals with CNSNP and healthy controls. However, moderate correlations were observed within the CNSNP group between the UT/LT ratio and pain intensity (ρ=0,542; p=0,037) as well as SGC functional disability (ρ=0,600; p=0,018), indicating that UT hyperactivity relative to LT may be associated with higher cervical pain intensity and SGC functional disability. Conclusion: The findings suggest similar SGC MA between individuals with CNSNP and healthy controls, although UT/LT ratio imbalances in the CNSNP group may be associated with increased cervical pain intensity and SGC functional disability. These results underscore the importance of future studies incorporating kinematic analyses to explore the interaction between MA and scapular mobility, offering a broader understanding of muscular adaptations in CNSNP.
Keywords: Chronic Neck Pain; Shoulder Muscle Activity; Surface Electromyography; Neck Disability Index; QuickDASH Introduction: Chronic non-specific neck pain (CNSNP) is a prevalent musculoskeletal condition. Previous studies suggest a possible association between CNSNP and muscle activation (MA) of the shoulder girdle complex (SGC), particularly in axioscapular muscles. Although research has examined SGC MA in individuals with CNSNP, findings are inconsistent and sometimes conflicting. Objective: To describe and characterize SGC MA in individuals with CNSNP compared to a healthy control group. Methodology: A cross-sectional case-control study was conducted with 30 participants divided into a CNSNP group (cases) and a control group, matched by age and sex. MA of the Serratus Anterior (SA), Upper Trapezius (UT), Middle Trapezius (MT), and Lower Trapezius (LT) was measured using surface electromyography (EMG) during shoulder flexion tasks. Pain intensity (Numeric Pain Rating Scale) and functional disability of the cervical spine and SGC (Neck Disability Index and QuickDASH) were also assessed. Results: No statistically significant differences in SGC MA were found between groups, suggesting similar activation in individuals with CNSNP and healthy controls. However, moderate correlations were observed within the CNSNP group between the UT/LT ratio and pain intensity (ρ=0,542; p=0,037) as well as SGC functional disability (ρ=0,600; p=0,018), indicating that UT hyperactivity relative to LT may be associated with higher cervical pain intensity and SGC functional disability. Conclusion: The findings suggest similar SGC MA between individuals with CNSNP and healthy controls, although UT/LT ratio imbalances in the CNSNP group may be associated with increased cervical pain intensity and SGC functional disability. These results underscore the importance of future studies incorporating kinematic analyses to explore the interaction between MA and scapular mobility, offering a broader understanding of muscular adaptations in CNSNP.
Description
Keywords
Dor Cervical Crónica Atividade Muscular do Ombro Eletromiografia de Superfície Chronic Neck Pain Shoulder Muscle Activity Surface Electromyography Neck Disability Index QuickDASH