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Vastus Medialis Muscle

The vastus medialis (aka vastus internus), often called the 'teardrop' muscle, is a medially located muscle of the quadriceps. The Vastus Medialis is one of five muscles which resides in the anterior compartment of the thigh. The vasti muscles appear to act largely in a co-ordinated manner throughout the control of knee extension. The vastus medialis contributes to correct tracking of the patella and characteristics of the vastus medialis, including its angle of insertion, correlates with presence of patellofemoral joint pain. However, this syndrome is complex and definitive evidence of causality has not yet been published.