Which muscles pull the patella medially?

Which muscles pull the patella medially?

• A. Gracilis and sartorius
• B. Gracilis and semitendinosus
• C. Gracilis and biceps femoris
• D. Gracilis and tensor fasciae latae

Answer: (A)

Medial patellar pull comes from muscles that cross the knee on its inner side and attach to structures that influence the patella’s alignment. The gracilis and sartorius are both part of the pes anserinus, attaching to the medial aspect of the proximal tibia. When these muscles contract, they tighten the medial knee region and guide the patella toward the inside of the femoral groove during knee flexion, providing the most direct medial pull among the options. The other pairs include muscles that either act more laterally or don’t provide as direct a medial influence on the patella. For example, the tensor fasciae latae tends to affect the lateral side via the iliotibial tract, and the biceps femoris is a lateral hamstring. Semitendinosus is part of the pes anserinus but, in this pairing, gracilis with sartorius gives the clearest medial pull on the patella.

Medial patellar pull comes from muscles that cross the knee on its inner side and attach to structures that influence the patella’s alignment. The gracilis and sartorius are both part of the pes anserinus, attaching to the medial aspect of the proximal tibia. When these muscles contract, they tighten the medial knee region and guide the patella toward the inside of the femoral groove during knee flexion, providing the most direct medial pull among the options.

The other pairs include muscles that either act more laterally or don’t provide as direct a medial influence on the patella. For example, the tensor fasciae latae tends to affect the lateral side via the iliotibial tract, and the biceps femoris is a lateral hamstring. Semitendinosus is part of the pes anserinus but, in this pairing, gracilis with sartorius gives the clearest medial pull on the patella.