Patellar tendon

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The patellar tendon, also called the patellar ligament, is a strong, flat band of connective tissue. It connects the patella (kneecap) to the tibial tuberosity on the anterior surface of the tibia. It is often referred to as a tendon because it connects muscle to bone. However, it changes classification once it extends from the patella to another bone. At that point, it technically becomes a ligament. It is a continuation of the quadriceps tendon, which connects the quadriceps muscles to the patella.

Functionally, the patellar tendon is a critical part of the knee extension mechanism. When the quadriceps muscles contract, they transmit force through the quadriceps tendon. The force also passes through the patella and patellar tendon. This sequence extends the leg at the knee joint. This action is essential for walking, kicking, jumping, and standing up. Because it endures high stress during these movements, the patellar tendon can become inflamed. It may also get damaged. This can lead to conditions like patellar tendinitis (commonly known as “jumper’s knee”). In severe cases, it may even cause a tendon rupture.

Anatomy of the knee joint including the patella, tendons(patellar and quadricpes) and tibial tuberosity.
Anatomy of the knee joint including the patella, tendons(patellar and quadricpes) and tibial tuberosity.

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