Medial Patellofemoral Ligament Functions

The video tutorial provides an in-depth look at the medial patellofemoral ligament, a crucial component in knee stability. It covers the ligament's anatomy, its role in preventing lateral patellar subluxation, and how to locate it on an X-ray. The tutorial also discusses the implications of ligament injuries, including rupture and associated conditions, and highlights the importance of MRI in diagnosis.

Where does the medial patellofemoral ligament originate?

• Between the medial epicondyle of the femur and adductor tubercle

• On the posterior side of the knee

• On the lateral aspect of the knee

• At the anterior cruciate ligament

How can the origin of the medial patellofemoral ligament be located on an X-ray?

• By finding the anterior cortex of the femur

• By identifying the posterior cortex extension line

• By locating the lateral epicondyle

• By measuring the distance from the patella

What is the primary function of the medial patellofemoral ligament?

• To support the lateral collateral ligament

• To prevent lateral migration of the patella

• To assist in knee flexion

• To enhance knee extension

What percentage of restraining force against lateral patellar dislocation does the medial patellofemoral ligament provide?

• 10 to 30 percent

• 30 to 50 percent

• 50 to 80 percent

• 80 to 100 percent

At what degree of knee flexion is the medial patellofemoral ligament most effective?

• 90 to 120 degrees

• 30 to 60 degrees

• 0 to 30 degrees

• 60 to 90 degrees

What is a common symptom of a ruptured medial patellofemoral ligament?

• Swelling in the lateral knee

• Pain and tenderness along the medial retinaculum

• Stiffness in the hip

• Numbness in the foot

What is the role of the trochlea in knee flexion beyond 30 degrees?

• It assists in knee extension

• It becomes the primary restraint

• It stabilizes the lateral meniscus

• It supports the medial collateral ligament

What injury is commonly associated with the rupture of the medial patellofemoral ligament?

• Anterior cruciate ligament tear

• Medial meniscus tear

• Lateral dislocation of the patella

• Lateral collateral ligament tear

What imaging technique is useful for confirming a tear in the medial patellofemoral ligament?

• X-ray

• MRI

• CT Scan

• Ultrasound

Which muscle tear may occur in association with lateral dislocation of the patella?

• Biceps femoris

• Rectus femoris

• Vastus medialis

• Vastus lateralis