Patellar Ligament
The "patellar ligament" is the center of the common tendon, which
continues from the patella (knee cap) to the tibia. It is a very strong,
flat band, the fibers of which are continuous over the front of the
patella with tendons which extend and pass down the sides of the patella
into the extremity of the tibia along the sides of its rounded prominence.
It is separated from the joint by a large padding of fat. A "medial
patellar retinaculum," or canal, in the patella, allows muscle and tissue
to pass through from the femur (thigh bone).