Limb Instabilities

Question 1

What structures may be injured with posterolateral corner instability?

Answer 1

• Fibrous Capsule
• Arcuate Popliteal Ligament
• Biceps Femoris
• Popliteus
• Quadriceps Dynamically

Question 2

What structures may be injured with posterior side instability?

Answer 2

• Fibrous Capsule
• Oblique Popliteal Ligament
• Posterior Cruciate Ligament
• Quadriceps Dynamically

Question 3

What structures may be injured with posteromedial corner instability?

Answer 3

• Fibrous Capsule
• Oblique Popliteal Ligament
• Semimembranosus
• Quadriceps Dynamically

Question 4

What structures may be injured with medial side instability?

Answer 4

• Fibrous Capsule
• Tibial Collateral Ligament
• Sartorius
• Gracilis
• Semitendinosus

Question 5

What structures may be injured with anteromedial corner instability?

Answer 5

• Medial Patellar Retinacula
• Fibers from Vastus Medialis Oblique Insertion
• Semitendinosus
• Semimembranosus
• Sartorius
  Gracilis

Question 6

What structures may be injured with anterior side instability?

Answer 6

• Quadriceps
• Infrapatellar Tendon
• Anterior Cruciate Ligament
• Hamstrings Dynamically

Question 7

What structures may be injured with anterolateral corner instability?

Answer 7

• Lateral Patellar Retinacula
• Fibers from Vastus Lateralis Insertion
• Biceps Femoris

Question 8

What structures may be injured with lateral side instability?

Answer 8

• Fibrous Capsule
• Fibular Collateral Ligament
• Iliotibial Tract and Band