The upper part of the<unk>  tendon attaches on the lower part of the knee cap, and the lower part of the<unk> tendon attaches to the tibial tubercle on the front of the tibia. Above the knee cap, the quadriceps muscle via the quadriceps tendon attaches to the top of the knee cap. This structure allows the knee to flex and extend, allowing use of basic functions such as walking and running.
Patellar tendon rupture
Patella fracture
Retrocalcaneal bursitis
Quadriceps tendon rupture
Iliotibial band syndrome
Strain (injury)
Biceps tendon rupture
Patellar dislocation