Valgus & Varus Forces on the Knee | MCL vs LCL Injuries

The video tutorial explains the forces that affect the medial collateral ligament (MCL) and lateral collateral ligament (LCL) of the knee. It distinguishes between varus and valgus forces, describing how these forces impact knee alignment and ligament damage. The tutorial highlights that valgus forces, which push the knees inward, are more common and often result in MCL injuries. It also discusses the concept of the unhappy triad, where the MCL, ACL, and medial meniscus are torn. The video emphasizes understanding these forces to predict and prevent knee injuries.

What is the primary difference between a valgus and a varus stance?

• Valgus stance is knock-kneed, varus is bowlegged.

• Both stances involve knees pointing outward.

• Valgus stance is bowlegged, varus is knock-kneed.

• Both stances involve knees pointing inward.

Which force is likely to cause damage to the MCL?

• A force pushing the knee upward.

• A force pushing the knee inward.

• A force pushing the knee outward.

• A force pushing the knee downward.

What happens to the LCL during a valgus force?

• It is stretched and tensed.

• It is unaffected.

• It is put on slack.

• It is compressed.

Why are MCL injuries more common than LCL injuries?

• LCL is more exposed to injuries.

• Medial forces are more common than lateral forces.

• Lateral forces are more common than medial forces.

• MCL is weaker than LCL.

What is the 'unhappy triad' in knee injuries?

• Tears of the LCL, PCL, and medial meniscus.

• Tears of the MCL, LCL, and ACL.

• Tears of the ACL, MCL, and medial meniscus.

• Tears of the ACL, PCL, and lateral meniscus.

How does the medial meniscus relate to the MCL?

• It is attached to the LCL.

• It is not connected to any ligaments.

• It is attached to the MCL.

• It is attached to the ACL.

In addition to the MCL, which other ligament can be damaged by a strong valgus force?

• LCL

• ACL

• PCL

• Meniscus