didnt know for KIN

Question 1

Joint Structure: Humeroulnar
and Humeroradial: medial ligaments

Answer 1

Medial (Ulnar) Collateral Ligament
* Anterior bundle
* Primary restraint to valgus at 20°-120° elbow flexion
* Posterior bundle
* Limits elbow extension
* Transverse fibers
* Limits distraction

Question 2

Joint Structure: Humeroulnar
and Humeroradial: Lateral Collateral Ligament Complex

Answer 2

• Lateral (Radial) Collateral Ligament
• Lateral Ulnar Collateral Ligament
• Annular Ligament
• Stabilizes radial head against ulna
• Combined:
• Restraint to varus
• Restraint to combined varus + supination
• Reinforces HRJ → limits distraction
• Maintains posterolateral stability
• Secures ulna to humerus (prevents dislocation)
• Prevents forearm from rotating off humerus in valgus and supination during
  flexion from a fully extended position

Question 3

MCP extension - arthrokinematics

Answer 3

posterior roll and posterior glide - double check