extensions of the aponeuroses of the vasti medialis and lateralis muscles that pass on each side of the patella, attaching to the margins of the patella and patellar ligament anteriorly, the collateral ligaments posteriorly, and the tibial condyles distally; form the anteromedial and (with the fibrous expansion of the iliotibial tract) the anterolateral portions of the fibrous capsule of the knee.lateral patellar retinaculum, medial patellar retinaculum