Electromyographic and magnetic resonance imaging evaluations of individuals with patellofemoral pain syndrome Avaliação eletromiográfica e ressonância magnética do joelho de indivíduos com síndrome da dor femoropatelar
نویسندگان
چکیده
Objectives: To analyze the electrical activity of the vastus medialis obliquus (VMO), vastus lateralis longus (VLL) and vastus lateralis obliquus (VLO) muscles of individuals with patellofemoral pain syndrome (PFPS) during maximum voluntary isometric contraction (MVIC) of lower leg extension with the knee at 30°; to assess pain using a visual analogue scale (VAS); and to assess patellar positioning using magnetic resonance imaging (MRI). Methods: Twelve women with PFPS and 12 clinically normal women were evaluated. They performed five MVICs of lower leg extension at 30° for electromyographic (EMG) analysis. Using MRI, the sulcus angle (SA), congruence angle (CA), patellar tilt angle (PTA) and patellar displacement (PD) were obtained. The following statistical tests were used: analysis of variance (ANOVA) for repeated measurements to assess EMGs; Mann-Whitney U test to analyze MRIs; Pearson’s (r) correlation test between EMGs and MRIs; and one-way ANOVA to evaluate pain (p≤0.05). Results: In the PFPS group, there was greater electrical activity in the VLL than in the VMO. In both groups, there was greater electrical activity in the VMO and VLL than in the VLO. In the PFPS group, the MRI showed higher SA and lower CA values, and there was a negative correlation between the VMO and the PTA. Conclusion: The data suggest that, in individuals with PFPS, greater electrical activity in the VLL combined with an increased SA and a decreased CA may contribute to patellar instability.
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Médico Residente do Departamento de Radiologia da Faculdade de Medicina de São José do Rio Preto (FAMERP), São Paulo, Brasil. Professor Adjunto de Radiologia da Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brasil. Professor do Serviço de Dermatologia da Faculdade de Medicina de São José do Rio Preto (FAMERP), São Paulo, Brasil. Professor Adjunto de Radiologia da Faculdade de M...
متن کاملElectromyographic and magnetic resonance imaging evaluations of individuals with patellofemoral pain syndrome.
OBJECTIVES To analyze the electrical activity of the vastus medialis obliquus (VMO), vastus lateralis longus (VLL) and vastus lateralis obliquus (VLO) muscles of individuals with patellofemoral pain syndrome (PFPS) during maximum voluntary isometric contraction (MVIC) of lower leg extension with the knee at 30 degrees; to assess pain using a visual analogue scale (VAS); and to assess patellar p...
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Purpose: To assess the effect of acupuncture on the electromyographic activity of masticatory muscles in patients with temporomandibular disorder (TMD). Methods: Forty women, from 20 to 40 years old, with TMD diagnosis were assessed using the electromyography of the masseter and temporal (anterior fascicle) muscles. Participants were distributed into study group (SG), which received acupuncture...
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