Motor control of the vastus medialis oblique and vastus lateralis muscles is disrupted during eccentric contractions in subjects with patellofemoral pain.

摘要: Background: Inappropriate control of the vastus medialis oblique and lateralis muscles by central nervous system can contribute to maltracking patella.Hypothesis: The activation timing amplitude will be different between normal subjects patients with patellofemoral pain.Study Design: Controlled laboratory study.Methods: Subjects pain asymptomatic performed maximum voluntary knee extension contractions initiated from a flexed an extended position. were quantified recorded electromyographic signals.Results: There no between-group differences in timing. was altered greatest extent during eccentric differed significantl...