Electromyographyc activity of the vastus medialis oblique muscle in female patients with patellofemoral syndrome

• Autor(a) principal: Bessa, Sâmia Najara Freitas
• Data de Publicação: 2008
• Outros Autores: Santos, Elielton Pedroza dos, Silveira, Renata Augusta Gomes, Maia, Paulo Henrique Barros, Brasileiro, Jamilson Simões
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Fisioterapia e Pesquisa
• Texto Completo: https://www.revistas.usp.br/fpusp/article/view/12059
• topic: Eletromiografia; Exercício; Músculo quadríceps; Síndrome da dor patelofemural; Electromyography; Exercise; Quadriceps muscle; Patellofemoral pain syndrome

The patellofemoral pain syndrome (PFPS) is among the most common knee pathologies. Although its etiology is not fully known, a dysfunction of the vastus medialis oblique (VMO) muscle has been pointed out as a possible cause. This study aimed at assessing, by means of electromyography, whether one or more, among ten usual resisted exercises, might produce VMO selective activation, in view of its clinic application. Twenty female volunteers, ten with PFPS (aged 24.7±4.35) and ten healthy ones (aged 22.5±1.58) were submitted to electromyographic evaluation of VMO, vastus lateralis longus and vastus lateralis oblique (VLO) muscles during ten exercises, including open and closed kinetic chain, at different degrees of knee flexion and of hip positions. None of the exercises showed to be selective for VMO activation, but some showed selective activation of the VLO. In the PFPS group all vastii showed lesser electromyographic activity than control group, in eight of the ten exercises; the VMO/VLO ratio was also lower (0.63) in PFPS group than in control (0.82, p