What is the function of the patella?

What is the function of the patella?

The patella rides in the tendon of the quadriceps femoris—the largest muscle of the thigh and the primary extensor of the knee. The patella functions to protect the knee joint, to lengthen the lever arm of the quadriceps femoris, and to increase the area of contact between the patellar ligament and the femur.

What happens if patella is removed?

Once your patella has been removed you will suffer from instability in your knee joint along with pain and swelling. You will also experience stiffness and a significant reduction in range of movement in your knee and may be unable to straighten your leg fully.

Do you need your patella?

Though the kneecap is not needed for walking or bending your leg, it makes your muscles more efficient and absorbs much of the stress between the upper and lower portions of the leg. Climbing stairs and squatting can put up to seven times your normal body weight on the kneecap and the joint behind it.

What does the patella do during knee extension?

The function of the patella is multifaceted. Its primary purpose is to serve as a mechanical pulley for the quadriceps as the patella changes the direction of the extension force throughout knee range of motion. Its contribution increases with progressive extension.

Can you still walk on a fractured patella?

In most cases, you should still be able to walk with a fractured kneecap while the knee is immobilized and healing. Your care team will recommend exercises and weight-bearing restrictions appropriate for each stage of recovery.

Is a patella a kneecap?

The patellofemoral (kneecap) joint is made up of two bones: the patella (the kneecap) and the femur (the thighbone). When the knee bends and straightens, the patella glides along a groove on the femur called the trochlea. Some people have differences in the way the kneecap and this bone fit together.

How do you sleep with a broken patella?

How do you sleep with a broken patella? Since you’ll be wearing a brace, cast, or splint to keep your knee immobile, sleeping on your back is likely to be most comfortable position. You may also want to use pillows underneath the knee to keep it slightly elevated.

How do you treat an injured patella?


  1. Rest the injured knee to prevent further injury and allow time for inflammation to subside.
  2. Apply ice to the knee to reduce inflammation.
  3. Take nonsteroidal anti-inflammatory drugs (NSAIDs) like Advil (ibuprofen) and Aleve (naproxen) to help with inflammation and alleviate some of the pain.

How do you heal patella?

A variety of physical therapy techniques can help reduce the symptoms associated with patellar tendinitis, including:

  1. Stretching exercises. Regular, steady stretching exercises can reduce muscle spasm and help lengthen the muscle-tendon unit.
  2. Strengthening exercises.
  3. Patellar tendon strap.
  4. Iontophoresis.

Should the patella move?

As long as your kneecap (patella) stays in its groove in the knee, you can walk, run, sit, stand, and move easily. When the kneecap slips out of the groove, problems and pain often result.

Where does patella go in your body?

knee joint
The patella is the largest sesamoid bone in the human body and is located anterior to knee joint within the tendon of the quadriceps femoris muscle, providing an attachment point for both the quadriceps tendon and the patellar ligament.

How do you rehab a fractured patella?

Your physical therapist may recommend incorporating simple stretching and strengthening movements into a home routine in between sessions. Physical therapy may continue once a week for six to eight weeks or until the patella fracture is healed completely.

What is the primary functional role of the patella?

The primary functional role of the patella is knee extension. The patella increases the leverage that the quadriceps tendon can exert on the femur by increasing the angle at which it acts.

How does the patella help with knee extension?

The main job of the patella is to help with knee extension and movement, while offering protection for the knee joint. In the case of knee extension, this movement happens by the patella offering leverage that the quadriceps tendons it’s attached to can put on the femur.

What does the patella look like in its complete form?

In its whole, complete form the patella is a flat, triangular-shaped bone that is fairly dense. The apex, or point, of the patella points downward towards the shin while the base of the bone sits upward towards the thigh.

How does the patella work with the quadriceps?

The patella increases the leverage that the quadriceps tendon can exert on the femur by increasing the angle at which it acts. The patella is attached to the tendon of the quadriceps femoris muscle, which contracts to extend/straighten the knee.